Radiation shielding of electron accelerator LIAM-2: calculation and geometry
In the present paper the calculation is carried out and the geometry of radiation shielding construction for a linear induction electron accelerator LIAМ-2 with the energy of 2 MeV and current in a pulse 3∙10³ A developed at the NSC KIPT is offered. It is shown that despite high accelerated electr...
Saved in:
| Published in: | Вопросы атомной науки и техники |
|---|---|
| Date: | 2006 |
| Main Authors: | , , , |
| Format: | Article |
| Language: | English |
| Published: |
Національний науковий центр «Харківський фізико-технічний інститут» НАН України
2006
|
| Subjects: | |
| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/79886 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Radiation shielding of electron accelerator LIAM-2: calculation and geometry / A.V. Mazilov, B.N. Razsukovannyj, J.A. Degtyar, V.A. Vinokurov // Вопросы атомной науки и техники. — 2006. — № 3. — С. 182-185. — Бібліогр.: 8 назв. — англ. |
Institution
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1859826545942593536 |
|---|---|
| author | Mazilov, A.V. Razsukovannyj, B.N. Degtyar, J.A. Vinokurov, V.A. |
| author_facet | Mazilov, A.V. Razsukovannyj, B.N. Degtyar, J.A. Vinokurov, V.A. |
| citation_txt | Radiation shielding of electron accelerator LIAM-2: calculation and geometry / A.V. Mazilov, B.N. Razsukovannyj, J.A. Degtyar, V.A. Vinokurov // Вопросы атомной науки и техники. — 2006. — № 3. — С. 182-185. — Бібліогр.: 8 назв. — англ. |
| collection | DSpace DC |
| container_title | Вопросы атомной науки и техники |
| description | In the present paper the calculation is carried out and the geometry of radiation shielding construction for a linear induction electron accelerator LIAМ-2 with the energy of 2 MeV and current in a pulse 3∙10³ A developed at the NSC KIPT is offered. It is shown that despite high accelerated electron current in the accelerator using a ferromagnetic tape, by a virtue of practical absence of beam dispersion in a transportation path, and specificity of X-ray bremsstrahlung topography, it is possible to realize, the effective radiation shielding of the personnel of categories "A" and "B" serving the accelerator with the aid of, for instance, lead.
Выполнен расчет и предложена геометрия построения радиационной защиты разработанного в ННЦ ХФТИ линейного индукционного ускорителя электронов ЛИУМ-2 с энергией 2 МэВ и током в импульсе 3∙10³ A. Показано, что, несмотря на большой ускоряемый ток электронов в ускорителе, использующем ферромагнитную ленту, в силу практического отсутствия рассеяния пучка в тракте транспортировки, специфики топографии тормозного рентгеновского излучения, можно осуществить эффективную радиационную защиту обслуживающего ускоритель персонала категорий «А» и «Б», используя, например, свинец.
Виконано розрахунок та запропонована геометрія побудови радіаційного захисту розробленого в ННЦ ХФТІ лінійного індукційного прискорювача електронів ЛІПМ-2 з енергією 2 МеВ і струмом в імпульсі 3∙10³ А. Показано, що, незважаючи на великий струм електронів у прискорювачі, який використовує феромагнітну стрічку, в силу практичної відсутності розсіювання пучка в тракті транспортування, специфіки топографії гальмового рентгенівського випромінювання, можна здійснити ефективний радіаційний захист персоналу категорій "А" і "Б", що обслуговує прискорювач, використовуючи, наприклад,
свинець.
|
| first_indexed | 2025-12-07T15:30:01Z |
| format | Article |
| fulltext |
RADIATION SHIELDING OF ELECTRON ACCELERATOR LIAM-2:
CALCULATION AND GEOMETRY
A.V. Mazilov, B.N. Razsukovannyj, J.A. Degtyar, V.A. Vinokurov
NSC KIPT, Kharkov, Ukraine
E-mail: mazilov@kipt.kharkov.ua
In the present paper the calculation is carried out and the geometry of radiation shielding construction for a linear
induction electron accelerator LIAМ-2 with the energy of 2 MeV and current in a pulse 3∙103 A developed at the
NSC KIPT is offered. It is shown that despite high accelerated electron current in the accelerator using a ferromag-
netic tape, by a virtue of practical absence of beam dispersion in a transportation path, and specificity of X-ray
bremsstrahlung topography, it is possible to realize, the effective radiation shielding of the personnel of categories
"A" and "B" serving the accelerator with the aid of, for instance, lead.
PACS: 06.60.Wa, 87.50.N,P
1. INTRODUCTION
Application of the radiation technologies in the in-
dustry which are based on the use of high energy elec-
tron beams (beam-ozone technologies) demands cre-
ation of electron accelerators with the energy up to
10 MeV and average beam power on the output over
200 kW [1-3]. The necessity for such electron beams is
great today. It is caused, first of all, by realization of the
technologies concerned with purification of Industrial
drains, drains of the large pharmacological and medical
plants, cattle-breeding farms with yield up to several
thousand cubic meter of water per day. To obtain such
high-strength electron beams, the multimodule accelerat-
ing systems consisting of a set of resonant (as a rule) ac-
celerators are used at present. Novelty of such technolo-
gies is caused also by the circumstance that until recently
there were no ways of manufacturing of windows for
lead-out of beam from the high power accelerator.
The way of manufacture of the accelerator output win-
dow based on the coal-coal material impregnated with sili-
cium [4] is offered at the NSC KIPT. This allowed making
an experimental linear inductive accelerator with electron
energy 2 MeV and current in a pulse 3∙103 A.
The accelerator consists of four cylindrical half-sec-
tions connected in series and having the length 78 cm
each one. The inductive system around the half-section
axis, being the axis of a beam, consists of an iron layer
with the thickness of 17 cm and a copper layer winding
that has thickness of 22 cm with factor of packaging 0.9.
The transitive chamber of the length of 35 cm with the
copper winding thickness equal to 10 cm is located be-
tween the second and the third half-section.
The accelerator is located in the room №316 of
building A of NSC KIPT. The layout of the accelerator
arrangement relative to the room №316 and adjacent
rooms is represented in Fig.1. Permanent workplaces of
the A-category personnel are located in adjacent rooms
№314 and №318, while the workplaces of the B-catego-
ry personnel are in the room №230 that is situated one
floor below the room №316. The B-category personnel
is also allowed being present in a corridor and outside
the building №A at a distance not less than 30 m from
the accelerator beam output. In the given paper we will
show that despite high accelerated electron current in
the accelerator using a ferromagnetic tape, by a virtue of
practical absence of beam dispersion in transportation
path, and specificity of X-ray bremsstrahlung topogra-
phy, it is possible to realize, without special difficulties,
the effective radiation shielding of the personnel serving
the accelerator with the aid of lead, for instance. We
will specify the most dangerous areas of ionizing radia-
tions in a path of the accelerator.
2. PARAMETERS OF THE ACCELERATOR
An electron beam from injector that is located in the
first half-section is accelerated up to the energy of
Е1=1 MeV in the accelerating gap between the first and
the second half-section. Then, the electron beam passes
the second half-section, the transitive chamber, and the
third half-section. After this it is accelerated in the accel-
erating gap between the third and the fourth half-section
up to the energy of Е2 =2 MeV, passes the fourth half-
section and "breaks in" a target (the point A in Fig.1).
The current in a pulse at the all stages of acceleration
makes Ipulse=3∙103 A, duration of a pulse τ=0.125∙10−6 s,
frequency of pulses f=5.6∙10−3 s−1 (1 pulse per 3 min-
utes). In emergency mode the electron beam breaks into
a wall of a beam pipe in the beginning of the second
half-section (the point B in Fig.1).
Since radiation losses of electrons in the target mate-
rial grow as atomic number grows, the aluminum hav-
ing the greatest effective atomic number has been cho-
sen from three probable materials (carbon, water and
aluminum) as a target for carrying out the calculations.
Iron was chosen as a material of the target for the case
of emergency mode (stainless steel of the beam pipe).
3. CONDITIONS OF RADIATION SAFETY
The value primary regulated under workers irradia-
tion is the limit of a doze that is equal to 20 mSv/year
for the A-category personnel and 2 mSv/year for the
B-category personnel. Distribution of the irradiation
doze within calendar year is not regulated by that [5]. At
the stage of designing of the protection against ionizing
radiation, the safety factor is used for designed rate of
equivalent doze at the personnel workplaces and is
equal to 2. Thus, taking into consideration the pulse
character of the radiation it is necessary, for mainte-
nance of standard conditions, to ensure that the average
value of the equivalent doze rate Р from the external
side of protection does not exceed the amount of Рlim:
____________________________________________________________
PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. 2006. № 3.
Series: Nuclear Physics Investigations (47), p.182-185.182
mailto:mazilov@kipt.kharkov.ua
P≤Plim=Dlim/T, (1)
where Dlim is the limit of the doze designed. Dlim=
10 mZv for the A-category personnel and 1 mZv for the
B-category personnel; Т is the irradiation duration and is
equal to 1700 h.
For the A-category personnel Plim(A)=5.9∙10−6 Sv/h.
For the B-category personnel Plim(B)=5,9∙10−7 Sv/h.
Fig.1. The scheme of an arrangement of accelerator LIAM-2: а) top view; b) side view
4. IONIZING RADIATION CHARACTERISTIC
Under interaction of electrons having an energy
1 MeV≤E≤2 MeV with a target, the radiation losses re-
veal itself as bremsstrahlung and process of electron-
positron pairs production. As the cross-section of the
pair production is small for this energy range, the main
kind of radiation is bremsstrahlung with some effective
energy Eeff=2/3 E at Eeff≤1.7 MeV, Eeff=1/2 E at
1.7<Eeff≤10 MeV with strongly pronounced anisotropy
dependent both on the energy of electrons and on the
target atomic number [6]. The experimental data sub-
mitted to [6] on the angular distribution of
bremsstrahlung for various electron and target energies
are obviously underestimated at the angles Θ lying in
the vicinity of 90° (Θ is the angle between the direction
of the electron beam and normal to the target plane).
This is obviously related with the sharp increase in ef-
fective thickness of the target in that direction. In calcu-
lations the values for the doze rate have been used at an-
gles of Θ=90°. These values were received by interpola-
tion of experimental data at the angles of Θ<90°
(Θ>90°), which are 2 (1.2) times higher than experi-
mental data for the energy of electrons Е=1 MeV (iron)
and Е=2 MeV (aluminum). For the other angles the ex-
perimental data were used. The angular distribution of
the average rate of the equivalent doze at a distance of
1 m from the target in the angle range that is necessary
for the given calculation at the average current
I=Ipulse∙τ∙f=2.1∙10−6 A is resulted in Table (Sv∙m2/h).
Angular distribution of the equivalent doze rate at the distance of 1 m from target
Θ 0 50 60 70 80 90 180
Point А (aluminum target, Е=2 MeV, Еeff=1 MeV) 0.323 0.074 0.042 0.024 0.021 0.017 0.0091
Point B (iron target, Е=1 MeV, Еeff=0.671 MeV) 0.073 - - - - 0.011 0.0077
5. METHOD OF PROTECTION CALCULATION
Calculation of a barrier protection thickness Δ is
based on the condition, under which the maximal equiv-
alent doze rate value in the locations of the personnel
does not exceed the established value of the designed
doze rate for the A- and B-category persons. Necessary
thickness of protection can be determined with the help
of the data given in tables, which are presented in Ref.
[7]. Here it is necessary to know the multiplicity of the
equivalent doze rate weakening, the protection material,
and the bremsstrahlung effective energy. The necessary
weakening multiplicity K(δ) is calculated according to
the formula:
,
)(
)(
2
0
δКRР
РК
des ⋅⋅
Θ= (2)
where Θ is the angle between the electron beam direc-
tion and the direction from the target to the calculation
point (see Fig.1); R is the distance from the target up to
the calculation point; Р0(Θ) is the doze rate at a distance
of 1 m from the target at the angle Θ without protection
and determined by Table; Рdes is the designed doze rate
for the personnel; K(δ) is the weakening multiplicity
due to protection via constructional materials of the ac-
celerator and barriers with the total thickness of δ on the
length R.
6. PROTECTIVE CHARACTERISTICS OF
THE ACCELERATOR MATERIALS
As a material for radiation protection against photon
radiation, copper is used extremely seldom despite its
better protective properties in comparison with iron.
Therefore, there are no data on values Δ(К) for copper
in the literature. However, as one should assume, the
mass weakening factors of copper and iron are practical-
ly equal because of close values of their atomic numbers
(Z = 23 for iron and Z = 26 for copper) [8]:
µ (Fe)=0.0599 cm2/g at Е=1 MeV
and 0.0424 cm2/g at Е=2 MeV;
µ (Cu)=0.0589 cm2/g at Е=1 MeV
and 0.048 cm2/g at Е=2 MeV.
Because of leaky package of copper winding of the
induction system its effective density makes ρeff=
____________________________________________________________
PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. 2006. № 3.
Series: Nuclear Physics Investigations (47), p.182-185.183
0.9ρ(Cu)=8.0 cm2/g. Taking into account that the densi-
ty of iron is ρ(Fe)=7.9 cm2/g it may be asserted that lin-
ear weakening factors of iron and copper are equal, i.e.
the layer of copper winding is equivalent to the layer of
iron of the same thickness. Thus, accelerating sections
have radial protection thickness δas=39 cm (iron); the
transitive chamber has protection with the thickness of
δtc=10 cm. In addition, there is end cap made of iron
with the thickness of δendcap=1 cm placed in the face
plane of the first half-section on the beam axis.
Interpolating the given thickness of the protection
made of iron with regard to the weakening multiplicity
and effective energy of bremsstrahlung [7], we have:
K(δas=39)=2.38∙106 at Еeff=1 MeV;
K(δas=39)>107 at Еeff=0.67 МeV;
K(δtc=10)=35.8 at Еeff=0.67 МeV;
K(δendcap=1)=1.2 at Еeff=1 MeV and Еeff=0.67 МeV.
The mass factors of water and wood are approximately
equal [8]. Taking into account the density of wood (≈0.7)
and the given weakening multiplicities for water [7], we
are able to estimate the weakening multiplicity for avail-
able wooden barriers and ceiling with the thickness δw:
K(δw=14)=1.2; K(δw=21)=K(δw=22)=1.4;
K(δw=40)=2.0 at Еeff=1 МeV and at Еeff=0.67 МeV.
7. THE CHOICE OF CALCULATED POINTS
Calculation points, at which the highest possible equiva-
lent doze rate is expected (Fig. 1) are the following:
- the point О0 is outside the building at a distance R0 =
30 m from the accelerator, Θ=0° (B-category person-
nel);
- the point О1 is in the corner of the room №318 at the
beam axis level (А-category personnel);
- the point 1О ′ is near the wall of the room №318 at
the beam axis level opposite to the point A (А-per-
sonnel);
- the point О2 located in the corner of the room №314
at the beam axis level (А-category personnel);
- the point 2О′ located near the wall of the room №314 at
the beam axis level opposite to the point О3 that is lo-
cated in a corner between the ceiling and the load-bear-
ing wall of the room №230 below the beam axis (B-cat-
egory personnel);
- the point 3О′ located near the ceiling of the room
№230 beneath the point A (B-category personnel);
- the point О4 is near the corridor wall at the beam
axis level (B-category personnel);
- the point О5 is in the corner between the ceiling and
the wall of the room №230 opposite to B’ (B-pers.);
- the point О6 is near the wall of the room №318 at
the level of the beam axis opposite to B’ (А-person-
nel);
- the point О7 is near wall of the room №314 at the
level of the beam axis opposite to the point B’
(А-personnel).
The presence of pairs of calculation points (О1 and
1О′ ), (О2 and 2О′ ), and (О3 and 3О′ ) is caused by com-
peting action of the following effects. The distance in-
creases up to the calculation point R with the angle Θ
reduction. Hence, the effective thickness of the protec-
tion Δeff increases that results, on the one hand, in reduc-
tion of the equivalent doze rate and, on the other hand,
in its increase due to the radiation anisotropy, which
functional dependence on Θ, generally speaking, is un-
known. The greatest value will be chosen from the cal-
culated values Δ and Δ’.
Calculation of the points О5, О6 and О7 is caused by
existence of supernumerary mode probability, at which
the beam may "break into" the transitive chamber.
8. CALCULATION OF THE PROTECTION
THICKNESS
8.1. The point 1О ′ : 1R′ =5.64 m; Θ=90°; POA(90°)=
0.017 Sv∙m2/h; K(δw)=1.2; Eeff=1 MeV. Substituting
these parameters into Eq.(2), we obtain the desired
weakening multiplicity K=75.5. The thickness of the
protection made of lead [7] is 1∆ ′ =6.6 cm.
The point О1: R1=5.78 m; Θ=77°; POA(77°)=
0.022 Sv∙m2/h; K(δw)=1.2; Eeff=1 MeV; K=93.0; the ef-
fective thickness of the protection Δ1eff=6.9 cm, the real
thickness Δ1=Δ1eff∙sinΘ1 =6.7 cm. Thus, the protection
thickness for the room №318 (А) ΔA(318)=6.7 cm.
8.2. The point 2О ′ : 2R′ =2.72 m; Θ=90°; POA(90°)=
0.017 Sv∙m2/h; K(δw)=1.4; Eeff=1 MeV. K=278; 2∆ ′
=8.4 cm.
The point O2: R2=3.0 m; Θ=65°; POA(65°)=
0.030 Sv∙m2/h; K(δw)=1.4; Eeff=1 MeV. K=404; Δ2-
eff=9.0 cm; Δ2=8.1 cm. Hence, ΔA(314)= 8.4 cm.
8.3. The point 3О ′ : 3R ′ =1.95 m; Θ=90°; POA(90°)=
0.017 Sv∙m2/h; K(δw)=2.0; Eeff=1 MeV; K=3489; 3∆ ′
=12.0 cm.
The point O3: R3=2.32 m; Θ=57°; POA(57°)=
0.034 Sv∙m2/h; K(δw)=2.0; Eeff=1 MeV. K=8502; Δ3-
eff=13.1 cm; Δ3=11.0 cm. Hence, ΔA(230)=12.0 cm.
8.4. The point O0: R0=30 m; Θ=0°; POA(0°)=
0.323 Sv∙m2/h; Plim(B)=5.9∙10−7 Sv∙m2/h; K(δw)=1.0;
Eeff=1 MeV; K=608; Δ4=9.5 cm; ΔA(O)=9.5 cm.
In the case of supernumerary "breaking in" of the beam
(supernumerary mode) at Θ=0°, the doze rate is
POB(0)=0.073 Sv∙m2/h <POA(0)=0.323 Sv∙m2/h. Hence,
the thickness of the frontal protection ΔA(O)=9.5 cm
may be considered sufficient for maintenance of stan-
dard conditions of radiation safety. The geometry of
lead radiation protection we recommend on the output
of the accelerator is represented in Fig.2.
Fig.2. Geometry of the radiation protection made of
lead on an output of the accelerator: ΔA(318)=6.7 cm,
ΔA(314)=8.4 cm, ΔA(230)=12.0 cm, ΔA(O)=9.5 cm;
α1=81°, α2=73°, α3=58°, α4=73°
The size of the angle α1 should provide the B-catego-
ry personnel safety in the room №230 and the adjacent
premises due to an increase in the distance Rα from the
point A that compensates the difference of the weaken-
ing multiplicities КА(318) and КА(230). It is obvious that
184
the angle α1 is determined via the condition
( )
( )
2
3
214
37.5
318
А
А
КR
RК
αж ц
=із чўи ш
; it follows that α1≥81°. Similarly,
α2=73°. Other angles are determined from the geometry
of the accelerator arrangement in the room №316.
8.5. The side protection δas=39 cm provides the
weakening multiplicity K(δas)≥2.38∙106 under radiation
from the point A in the direction of angles 180°>Θ≥90°,
and K(δas)≥7∙107 at the supernumerary "breaking in" of
the beam in the second half-section within the angle
range 180°<Θ<0°. It follows from the comparison of
these values with the values for K obtained under the
item 8.3 that the side surface of the accelerating half-
sections does not require any additional protection.
8.6. The point O4. а) R4A=AO4=4.95 m; Θ4<180°;
POA(180°)=0.0091 Sv∙m2/h; K(δ3)=1.2; K(δw)=1.4;
Eeff=1 MeV; K=375; Δ2eff=13.1 cm; Δ4A(180°)=8.9 cm.
b) R4B=BO4=2.25 m; Θ4=180°; POB(180°)=
0.0077 Sv∙m2/h; K(δ3)=1.2; K(δw)=1.4; Eeff=0.67 MeV;
K=1534; Δ4B(180°)=6.9 cm. Hence, Δ4(180°)=8.9 cm.
8.7. The point O5: R5= 3R′ =1.95 m; Θ5=90°;
POB(90°)= 0.011 Sv∙m2/h; K(δtc)=35.8; K(δw)=2.0;
Eeff=0.67 MeV; K=68.5; Δ4B(180°)=6.9 cm. Hence,
ΔB’(230)=4.0 cm.
8.8. The point O6: R6= 1R′ =5.64 m; Θ6=90°;
PO6(90°)= 0.011 Sv∙m2/h; K(δtc)=35.8; K(δw)=1.2;
Eeff=0.67 MeV; K=1.36. Hence, ΔB’(318)=0.3 cm.
8.9. The point O7: R7= 2R ′ ; Θ7=90°; PO7(90°)=
PO6(90°); K(δtc)=35.8; K(δw)=1.4; K=5.0. Hence,
ΔB’(314)=1.7 cm.
The geometry of the transitive chamber protection
that we recommend is represented in Fig.3. The values
of the angles α1≥74° and α2=82° are determined similar-
ly to the item 8.4.
9. CONCLUSIONS
The conditions of the personnel irradiation consid-
ered in this paper assume a total metamorphosis of a
beam power into a radiation. The thicknesses of the ac-
celerator protection calculated provide radiation safety
of the personnel with a safety factor that is above the
safety factor stipulated by the requirement of protection
designing against external radiations. The given circum-
stance is the result of that the requirements for initial
conditions such as the radiation angular distribution, ra-
diation parameters of nonconventional protection mate-
rials (copper, wood), the duration of irradiation of the
personnel were overestimated during calculations.
Note, it is not considered in this paper the protection
against weaker radiation concerned with the partial loss
of the beam power on the parts of non-uniform magnet-
ic field, accelerating gaps, collimator, etc is not consid-
ered in this paper. Under real conditions, the intensity of
such radiation is not amenable to exact calculation and
should be determined experimentally in course of start-
ing-up and adjustment works.
Fig.3. Geometry of the radiation protection made of
lead around of the transitive chamber:
ΔB’(318)=0.3 cm, ΔB’(314)=1.7 cm, ΔB’(230)=4.0 cm,
α1=82°, α2=74°, α3=58°, α4=73°
REFERENCES
1. R.J. Adler. Comparison of DC and Pulsed Beams
for Commercial Applications. Proc. of BEAMS–94,
San Diego, v.VI, p.29.
2. Р. Gehringer. Groundwater Remediation by
Ozone/Electron Beam Irradiation Treatment. Proc.
of the 1st Int. Conf. On Advanced Oxidation Tech-
nologies for Water and Air Remidiation. London,
Ontario, Canada. 1994, p.30.
3. N. Getoff. Electron Beam Remediation of Water.
Proc. of the 1st Int. Conf. On Advanced Oxidation
Technologies for Water and Air Remediation, Lon-
don Ontario Canada. 1994, p.128.
4. O.F. Kovpik, Е.А. Kornilov, V.V. Kolosenko et al.
Carbon-carbon windows for lead-out of electron and
proton beams from accelerators into atmosphere //
Problems of Atomic Science and Technology. Series:
Nuclear Physics Investigations 2004, №1(42), p.77-
79.
5. Radiation standards of Ukraine (NRSU-97). State
hygienic regulations. Kiev, 1998.
6. Sanitary regulations of arrangement and operation
of electron accelerators up to 100 МeV. M., 1981.
7. V.D. Kozlov. Reference book on radiation safety.
М.: “Atomizdat”, 1977.
8. L.R. Kimmel, V.P. Mashkovich. Ionizing radiation
protection. М.: “Atomizdat”, 1966.
РАДИАЦИОННАЯ ЗАЩИТА УСКОРИТЕЛЯ ЭЛЕКТРОНОВ ЛИУМ-2: РАСЧЕТ И ГЕОМЕТРИЯ
А.В. Мазилов, Б.Н. Разсукованный, Ю.А. Дегтярь, В.А. Винокуров
Выполнен расчет и предложена геометрия построения радиационной защиты разработанного в ННЦ
ХФТИ линейного индукционного ускорителя электронов ЛИУМ-2 с энергией 2 МэВ и током в импульсе
3∙103 A. Показано, что, несмотря на большой ускоряемый ток электронов в ускорителе, использующем фер-
ромагнитную ленту, в силу практического отсутствия рассеяния пучка в тракте транспортировки, специфи-
ки топографии тормозного рентгеновского излучения, можно осуществить эффективную радиационную за-
щиту обслуживающего ускоритель персонала категорий «А» и «Б», используя, например, свинец.
РАДІАЦІЙНИЙ ЗАХИСТ ПРИСКОРЮВАЧА ЕЛЕКТРОНІВ ЛІПМ-2: РОЗРАХУНОК І ГЕОМЕТРІЯ
О.В. Мазілов, Б.М. Разсукований, Ю.А. Дегтярь, В.О. Винокуров
____________________________________________________________
PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. 2006. № 3.
Series: Nuclear Physics Investigations (47), p.182-185.185
Виконано розрахунок та запропонована геометрія побудови радіаційного захисту розробленого в ННЦ
ХФТІ лінійного індукційного прискорювача електронів ЛІПМ-2 з енергією 2 МеВ і струмом в імпульсі
3.103 А. Показано, що, незважаючи на великий струм електронів у прискорювачі, який використовує
феромагнітну стрічку, в силу практичної відсутності розсіювання пучка в тракті транспортування,
специфіки топографії гальмового рентгенівського випромінювання, можна здійснити ефективний
радіаційний захист персоналу категорій "А" і "Б", що обслуговує прискорювач, використовуючи, наприклад,
свинець.
186
|
| id | nasplib_isofts_kiev_ua-123456789-79886 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1562-6016 |
| language | English |
| last_indexed | 2025-12-07T15:30:01Z |
| publishDate | 2006 |
| publisher | Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
| record_format | dspace |
| spelling | Mazilov, A.V. Razsukovannyj, B.N. Degtyar, J.A. Vinokurov, V.A. 2015-04-06T15:58:46Z 2015-04-06T15:58:46Z 2006 Radiation shielding of electron accelerator LIAM-2: calculation and geometry / A.V. Mazilov, B.N. Razsukovannyj, J.A. Degtyar, V.A. Vinokurov // Вопросы атомной науки и техники. — 2006. — № 3. — С. 182-185. — Бібліогр.: 8 назв. — англ. 1562-6016 PACS: 06.60.Wa, 87.50.N,P https://nasplib.isofts.kiev.ua/handle/123456789/79886 In the present paper the calculation is carried out and the geometry of radiation shielding construction for a linear induction electron accelerator LIAМ-2 with the energy of 2 MeV and current in a pulse 3∙10³ A developed at the NSC KIPT is offered. It is shown that despite high accelerated electron current in the accelerator using a ferromagnetic tape, by a virtue of practical absence of beam dispersion in a transportation path, and specificity of X-ray bremsstrahlung topography, it is possible to realize, the effective radiation shielding of the personnel of categories "A" and "B" serving the accelerator with the aid of, for instance, lead. Выполнен расчет и предложена геометрия построения радиационной защиты разработанного в ННЦ ХФТИ линейного индукционного ускорителя электронов ЛИУМ-2 с энергией 2 МэВ и током в импульсе 3∙10³ A. Показано, что, несмотря на большой ускоряемый ток электронов в ускорителе, использующем ферромагнитную ленту, в силу практического отсутствия рассеяния пучка в тракте транспортировки, специфики топографии тормозного рентгеновского излучения, можно осуществить эффективную радиационную защиту обслуживающего ускоритель персонала категорий «А» и «Б», используя, например, свинец. Виконано розрахунок та запропонована геометрія побудови радіаційного захисту розробленого в ННЦ ХФТІ лінійного індукційного прискорювача електронів ЛІПМ-2 з енергією 2 МеВ і струмом в імпульсі 3∙10³ А. Показано, що, незважаючи на великий струм електронів у прискорювачі, який використовує феромагнітну стрічку, в силу практичної відсутності розсіювання пучка в тракті транспортування, специфіки топографії гальмового рентгенівського випромінювання, можна здійснити ефективний радіаційний захист персоналу категорій "А" і "Б", що обслуговує прискорювач, використовуючи, наприклад, свинець. en Національний науковий центр «Харківський фізико-технічний інститут» НАН України Вопросы атомной науки и техники Применение ускорителей в радиационных технологиях Radiation shielding of electron accelerator LIAM-2: calculation and geometry Радиационная защита ускорителя электронов ЛИУМ-2: расчет и геометрия Радіаційний захист прискорювача електронів ЛІПМ-2: розрахунок і геометрія Article published earlier |
| spellingShingle | Radiation shielding of electron accelerator LIAM-2: calculation and geometry Mazilov, A.V. Razsukovannyj, B.N. Degtyar, J.A. Vinokurov, V.A. Применение ускорителей в радиационных технологиях |
| title | Radiation shielding of electron accelerator LIAM-2: calculation and geometry |
| title_alt | Радиационная защита ускорителя электронов ЛИУМ-2: расчет и геометрия Радіаційний захист прискорювача електронів ЛІПМ-2: розрахунок і геометрія |
| title_full | Radiation shielding of electron accelerator LIAM-2: calculation and geometry |
| title_fullStr | Radiation shielding of electron accelerator LIAM-2: calculation and geometry |
| title_full_unstemmed | Radiation shielding of electron accelerator LIAM-2: calculation and geometry |
| title_short | Radiation shielding of electron accelerator LIAM-2: calculation and geometry |
| title_sort | radiation shielding of electron accelerator liam-2: calculation and geometry |
| topic | Применение ускорителей в радиационных технологиях |
| topic_facet | Применение ускорителей в радиационных технологиях |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/79886 |
| work_keys_str_mv | AT mazilovav radiationshieldingofelectronacceleratorliam2calculationandgeometry AT razsukovannyjbn radiationshieldingofelectronacceleratorliam2calculationandgeometry AT degtyarja radiationshieldingofelectronacceleratorliam2calculationandgeometry AT vinokurovva radiationshieldingofelectronacceleratorliam2calculationandgeometry AT mazilovav radiacionnaâzaŝitauskoritelâélektronovlium2rasčetigeometriâ AT razsukovannyjbn radiacionnaâzaŝitauskoritelâélektronovlium2rasčetigeometriâ AT degtyarja radiacionnaâzaŝitauskoritelâélektronovlium2rasčetigeometriâ AT vinokurovva radiacionnaâzaŝitauskoritelâélektronovlium2rasčetigeometriâ AT mazilovav radíacíiniizahistpriskorûvačaelektronívlípm2rozrahunokígeometríâ AT razsukovannyjbn radíacíiniizahistpriskorûvačaelektronívlípm2rozrahunokígeometríâ AT degtyarja radíacíiniizahistpriskorûvačaelektronívlípm2rozrahunokígeometríâ AT vinokurovva radíacíiniizahistpriskorûvačaelektronívlípm2rozrahunokígeometríâ |