Observation of parametric X-ray radiation excited by 50 GeV protons and identification of background radiation origin
The experimental layout designed to study properties of focused parametric X-ray radiation generated by relativistic protons in a bent crystal and parametric X-ray radiation generated by relativistic ions and positrons at accelerator U70 is described. Preliminary results of measurements of spectra o...
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| Zitieren: | Observation of parametric X-ray radiation excited by 50 GeV protons and identification of background radiation origin / A.G. Afonin, G.I. Britvich, Yu.A. Chesnokov, P.N. Chirkov, A.A. Durum, M.Yu. Kostin,A.V. Lutchev, V.A. Maisheev, A.A. Yanovich, A.V. Shchagin, V.I. Truten’,V.B. Ganenko, I.V. Kirillin, N.F. Shul’ga, A.S. Kubankin, N.N. Nasonov,A.P. Potylitsyn, A.S. Gogolev, S.R. Uglov, Yu.M. Cherepennikov, P. Karataev // Вопросы атомной науки и техники. — 2013. — № 4. — С. 315-319. — Бібліогр.: 9 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1860250719840370688 |
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| author | Afonin, A.G. Britvich, G.I. Chesnokov, Yu.A. Chirkov, P.N. Durum, A.A. Kostin, M.Yu. Lutchev, A.V Maisheev, V.A. Yanovich, A.A. Shchagin, A.V. Truten’, V.I. Ganenko, V.B. Kirillin, I.V. Shul’ga, N.F. Kubankin, A.S. Nasonov, N.N. Potylitsyn, A.P. Gogolev, A.S. Uglov, S.R. Cherepennikov, Yu.M. Karataev, P. |
| author_facet | Afonin, A.G. Britvich, G.I. Chesnokov, Yu.A. Chirkov, P.N. Durum, A.A. Kostin, M.Yu. Lutchev, A.V Maisheev, V.A. Yanovich, A.A. Shchagin, A.V. Truten’, V.I. Ganenko, V.B. Kirillin, I.V. Shul’ga, N.F. Kubankin, A.S. Nasonov, N.N. Potylitsyn, A.P. Gogolev, A.S. Uglov, S.R. Cherepennikov, Yu.M. Karataev, P. |
| citation_txt | Observation of parametric X-ray radiation excited by 50 GeV protons and identification of background radiation origin / A.G. Afonin, G.I. Britvich, Yu.A. Chesnokov, P.N. Chirkov, A.A. Durum, M.Yu. Kostin,A.V. Lutchev, V.A. Maisheev, A.A. Yanovich, A.V. Shchagin, V.I. Truten’,V.B. Ganenko, I.V. Kirillin, N.F. Shul’ga, A.S. Kubankin, N.N. Nasonov,A.P. Potylitsyn, A.S. Gogolev, S.R. Uglov, Yu.M. Cherepennikov, P. Karataev // Вопросы атомной науки и техники. — 2013. — № 4. — С. 315-319. — Бібліогр.: 9 назв. — англ. |
| collection | DSpace DC |
| container_title | Вопросы атомной науки и техники |
| description | The experimental layout designed to study properties of focused parametric X-ray radiation generated by relativistic protons in a bent crystal and parametric X-ray radiation generated by relativistic ions and positrons at accelerator U70 is described. Preliminary results of measurements of spectra of characteristic and parametric X-rays observed at 50 GeV proton beam are shown and discussed. The origin of the background radiation that obstacles for detail research of the PXR properties at proton beam is identified. Moreover, the distribution of the ionization losses of relativistic charged particles in the X-ray detector similar to Landau distribution is measured and discussed.
Описана експериментальна установка на виведеному пучку прискорювача У70, яка призначена для досліджень сфокусованого параметричного рентгенівського випромінювання (ПРВ) і ПРВ, збуджуваного релятивістськими іонами та ін. частинками. Наведено попередні результати вимірювань спектрів ПРВ і характеристичного рентгенівського випромінювань. Ідентифіковано походження спектрального фону, що перешкоджає дослідженням ПРВ на прискорювачі протонів. Виміряно і обговорюється розподіл іонізаційних втрат релятивістських заряджених частинок у рентгенівському детекторі, подібний розподілу Ландау.
Описана экспериментальная установка на выведенном пучке ускорителя У70, которая предназначена для исследований сфокусированного параметрического рентгеновского излучения (ПРИ) и ПРИ, возбуждаемого релятивистскими ионами и др. частицами. Приведены предварительные результаты измерений спектров ПРИ и характеристического рентгеновского излучения. Идентифицировано происхождение спектрального фона, препятствующего исследованиям ПРИ на ускорителе протонов. Измерено и обсуждается распределение ионизационных потерь релятивистских заряженных частиц в рентгеновском детекторе, подобное распределению Ландау.
|
| first_indexed | 2025-12-07T18:42:49Z |
| format | Article |
| fulltext |
ISSN 1562-6016. ВАНТ. 2013. №4(86) 315
OBSERVATION OF PARAMETRIC X-RAY RADIATION EXCITED
BY 50 GeV PROTONS AND IDENTIFICATION OF BACKGROUND
RADIATION ORIGIN
A.G. Afonin1, G.I. Britvich1, Yu.A. Chesnokov1, P.N. Chirkov1, A.A. Durum1, M.Yu. Kostin1,
A.V. Lutchev1, V.A. Maisheev1, A.A. Yanovich1, A.V. Shchagin2*, V.I. Truten’2,
V.B. Ganenko2, I.V. Kirillin2, N.F. Shul’ga2,6, A.S. Kubankin3, N.N. Nasonov3,
A.P. Potylitsyn4, A.S. Gogolev4, S.R. Uglov4, Yu.M. Cherepennikov4, P. Karataev5
1Institute of High Energy Physics, Moscow Region, Protvino, Russia;
2National Science Center “Kharkov Institute of Physics and Technology”, Kharkov, Ukraine;
3Belgorod State University, Belgorod, Russia;
4Tomsk Polytechnic University, Tomsk, Russia;
5John Adams Institute at Royal Holloway College, University of London, Egham, UK;
6N.V. Karazin Kharkov National University, Kharkov, Ukraine
*E-mail: shchagin@kipt.kharkov.ua
The experimental layout designed to study properties of focused parametric X-ray radiation generated by relativ-
istic protons in a bent crystal and parametric X-ray radiation generated by relativistic ions and positrons at accelera-
tor U70 is described. Preliminary results of measurements of spectra of characteristic and parametric X-rays ob-
served at 50 GeV proton beam are shown and discussed. The origin of the background radiation that obstacles for
detail research of the PXR properties at proton beam is identified. Moreover, the distribution of the ionization losses
of relativistic charged particles in the X-ray detector similar to Landau distribution is measured and discussed.
PACS: 78.70.–g, 41.60.-m
INTRODUCTION
The parametric X-ray radiation (PXR) of relativistic
charged particles in crystals has been observed and stud-
ied experimentally in a number of papers (see, for ex-
ample, reviews of some experimental research in Refs.
[1, 2]). In particular, the PXR excited by relativistic
protons in crystals has been observed in Refs. [3 - 5].
Therein, a significant background radiation in X-ray
spectra was observed but the origin of the background
was unclear. We have started experiments to observe
the focused PXR emitted by protons in bent crystal [6]
and PXR emitted by relativistic ions and positrons at
accelerator U70; however, a significant background
radiation hampers the detail research. In this paper we
describe the experimental facility and report about the
experimental observation of characteristic and paramet-
ric X-ray spectra and identify the origin of the back-
ground radiation at proton beam.
1. EXPERIMENTAL
The experiment has been performed at extracted pro-
ton beam in accelerator U70 at IHEP, Protvino, Russia.
The beamline of the extracted proton beam and the ex-
perimental layout are illustrated in Fig. 1.
The proton beam is extracted from the accelerator
U70 to the beamline № 4a by a Si crystal bent on
90 mrad. The extraction of the beam by a bent crystal is
well described in [7]. The extracted by the bent Si crys-
tal proton beam population is about 107 protons per a
cycle. The BM1 are BM2 are the 6-m long bending
magnets that provide a bending angle of the proton
beam of 40 mrad. The copper collimators CH and CV of
length 75 cm form a rectangular shape of the proton
beam. The 2-m long quadrupole lenses (QH and QV)
provide the beam divergence of about 100 μrad in both
horizontal and vertical planes.
Fig. 1. The beamline and the experimental layout: The
proton beam of energy 50 GeV is extracted from the
U70 circular accelerator by a bent crystal BC. Then,
the beam passes the bending magnet (BM1), horizontal
and vertical collimators (CH and CV), bending magnet
(BM2), quadrupole lenses (QH and QV), and target (T)
mounted on a goniometer. The number of protons in the
beam is registered by a fast scintillator counter (B).
The X-ray detector (D) is shown at two locations
The proton beam profile measured in the vicinity of
the target is shown in Fig. 2. The measurements were
performed using the Dosimetry Film EBT2 and a scan-
ner with the resolution of 20 μm.
The spectra were measured by a spectrometer con-
sisting of an X-ray thermoelectrically cooled Si detector
XR-100CR and a digital pulse processor PX4, both
from Amptek. A 500 µm thick Si crystal detector with
area of 6 mm2 is equipped with a 0.3 mil Be window.
The detector contains an inner collimator with area of
4.4 mm2, which is opaque for soft X-rays but transpar-
ent for hard X-rays and relativistic particles. Due to in-
tense background radiation we applied the shortest
available in the PX4 peaking time 0.8 µs. The energy
resolution of the spectrometer is about 260 eV at X-ray
energy 5.9 keV. The measurements were performed
during the extraction of the proton beam. The extraction
time was 1 s executed every 9 s. The typical beam popu-
lation was about (5…8)⋅106 protons per extraction.
ISSN 1562-6016. ВАНТ. 2013. №4(86) 316
Fig. 2. The proton beam profile in the vicinity
of the target
Crystalline targets were mounted on a goniometer
with angular step of 2.18⋅10-5 rad. The goniometer, the
targets and the X-ray detector were assembled in air.
The proton beam propagated from the vacuum tube to
air through a Mylar foil. The distance from the Mylar
foil to the target was about 1 m.
2. OBSERVATION OF CHARACTERISTIC
X-RAY RADIATION
To make sure in our equipment we performed meas-
urements of characteristic X-ray radiation (CXR) ex-
cited by 50 GeV proton beam in a copper target. The
experimental setup is illustrated in Fig. 3.
Fig. 3. The experimental setup for observation
of characteristic X-ray radiation. Beam protons excite
characteristic X-ray radiation in a copper foil.
The spectrum of x-rays is measured by the detector D.
The secondary relativistic particles like muons and
pions accompanying the proton beam also cross
the detector along its surface
As a target, we used a 20 μm thick Cu foil tilted at
450 angle with respect to the proton beam. The X-ray
detector was installed at a 900 observation angle 60 cm
away from the target. The measured spectrum is shown
in Fig. 4 without the background subtraction.
In the spectrum shown in Fig. 4,a one can clearly see
two spectral peaks with energies practically coinciding
with reference energies of 8.0 and 8.9 keV of Kα and Kβ
CXR radiation of Cu respectively. The observation of
the Cu CXR clearly demonstrates the possibility to
measure X-ray spectra at the facility despite of the
background radiation. In Fig. 4,b one can see the con-
tinuous background in the entire spectral range. The
origin of this continuous background will be discussed
below.
Fig. 4. The measured spectrum of characteristic X-ray
radiation is shown without background subtraction
in the range of 3…13 keV in Fig. a and in the range
of 3…317 keV in Fig. b. Peaks with energies of 8.0 keV
and 8.9 keV are due to Kα and Kβ characteristic
X-ray radiation from the Cu target
3. OBSERVATION OF PARAMETRIC
X-RAYS
As a target, we used a flat 300 μm thick Si crystal
slab with (111) crystallographic plane oriented parallel
to the slab surface. The detector was installed at obser-
vation angle 019.9obsθ ≈ at distance 25 cm away from
the target. The Si target was mounted on the goniometer
and preliminarily aligned for observation of the PXR in
Bragg geometry. The experimental setup for the PXR
studies is shown in Fig. 5.
Fig. 5. The experimental setup for the PXR
measurements
The transverse proton beam dimensions on the target
were about 25 mm in vertical direction and 10 mm in
horizontal direction. The experimental angular resolu-
tion was about 0.11 rad in vertical direction and 0.05 rad
in horizontal direction. Both angular resolutions exceed
typical angular size of the PXR reflection 1γ − , where γ
is the relativistic factor. In our case 1γ − = 0.019 rad at
proton beam energy 50 GeV. Therefore it is impossible
to resolve clearly a fine structure of the PXR reflection
yield in present experiment. Two spectra measured
when the PXR reflection is aligned towards the detector
and when the PXR reflection was aligned aside from the
detector are shown in Fig. 6.
ISSN 1562-6016. ВАНТ. 2013. №4(86) 317
Fig. 6. Spectra without background subtraction
measured when the PXR reflection is directed towards
the detector (a) and when the PXR reflection is aligned
aside from the detector (b). The arrow shows
the PXR spectral peak
In Fig. 6,a one can see a spectral peak with the en-
ergy of 10.0 keV. However, the peak is absent in the
same spectrum shown in Fig. 6,b measured at random
crystal orientation. The energy of the measured peak
coincident to the energy ωh of the PXR reflection cal-
culated by Eq. (9.5) [1] at the angle of crystal orienta-
tion of φ =8.70
sin
1 cos obs
g V φω
β ε θ
⋅ ⋅ ⋅
=
− ⋅ ⋅
h
h , (1)
where g is the module of the reciprocal lattice vector
for Si crystallographic plane (111), V is the proton ve-
locity, /V cβ = , ε is the permittivity, obsθ is the ob-
servation angle. Thus, the spectral peak with the energy
of 10.0 keV definitely appears due to the PXR reflection
from Si crystallographic plane (111). Other experimen-
tal data on the PXR will be considered in more details
elsewhere.
The PXR peak / background ratio in the spectrum
shown in Fig. 6,a is about 1:1. This ratio is much worse
then one in experiments at electron beams, where the
peak / background ratio can reach values 100:1 or more
[1, 2]. The origin of so high spectral background at pro-
ton accelerator and the wide asymmetric spectral peak
with the maximum at energy of about 156 keV is con-
sidered below.
4. THE ORIGIN OF THE SPECTRAL
BACKGROUND AND LANDAU
DISTRIBUTION OF THE IONIZATION
LOSSES
Let us consider the origin of the wide asymmetric
spectral peak with the maximum of the peak at energy
of about exp
max 155E = keV observed in Fig. 6. During the
experiments we found that the properties of the peak at
a fixed detector location are the same for an arbitrary
target alignment or even without the target at all. This
means that the peak belongs to some kind of back-
ground radiation in the experimental area. We suppose
the peak and the spectral background are generated by
secondary relativistic charged particles such as muons
and/or pions, which are produced as a result of the in-
teraction of beam protons with bending crystal, and/or
the collimators and/or other components of the beamline
shown in Fig. 1.
The shape of the measured spectral peak is very
similar to the shape of the Landau or Landau-Vavilov
distribution of ionization losses of charged particles in a
slab, which one can see, for example, in Fig. 27.7 in [8]
and in Fig. 3 in [9]. The secondary particles move al-
most parallel to the proton beam and pass in the X-ray
detector, where they produce the ionization losses. We
found that the energy in the maximum of the measured
peak nearly coincides with the calculated value of
max 154.7calcE = keV of the most probable ionization en-
ergy losses by ultra-relativistic particles in our Si detec-
tor. The calculation has been performed using Eq.
(27.11) [8] for ultra-relativistic particles accompanying
the proton beam
( )
2
2
2lncalc
m
p
mcE jξξ
ω
⎡ ⎤
⎢ ⎥= +
⎢ ⎥
⎣ ⎦h
, (2)
where m is the electron mass, j =0.200, pω is the
plasma frequency of the Si detector crystal,
( ) ( ) ( )2/ / 2 /K A Z xξ β= ⋅ ⋅ , 2 24 A eK N r m cπ= ⋅ ⋅ ⋅ ⋅ ⋅ ,
A is the atomic mass, Z is the atomic number, AN is
the Avogadro’s number, x is the path in units 2g cm−⋅ ,
er is the classic electron radius. The particle path in the
Si detector crystal at PXR experiment was
/ cos obsT θ =0.523 mm, where T is the Si crystal de-
tector thickness.
A good agreement of the experimental and calcu-
lated values means that the spectral peak really is the
result of the ionization losses in the detector by ultra-
relativistic charged particles accompanying and moving
almost parallel to the proton beam. Moreover, the addi-
tional confirmation is that the ionization peak is absent
in the spectrum measured when the detector surface is
parallel to the proton beam (Fig. 3) as it is seen in
Fig. 4,b. In this case the ultra-relativistic charged parti-
cles pass through the detector along its surface and their
path in the detector is about 2.45 mm. The most prob-
able ionization losses calculated by Eq. (2) are 780 keV,
which is out of the operating range of our spectrometer.
It is worth it to point out that in the PXR experiment
the cooled Si detector was working simultaneously both
as the X-ray detector that registers the PXR spectral
peak with the energy of 10.0 keV and as the
dE
dx
detec-
tor that registers the ionization losses of ultra-relativistic
charged particles with the most probable energy losses
ISSN 1562-6016. ВАНТ. 2013. №4(86) 318
of 155 keV. One can see both spectral peaks in the spec-
trum shown in Fig. 5,a. The relation of the number of
the PXR quanta in the PXR spectral peak to the number
of charged particles in the ionization spectral peak is
about 1.0⋅10-2.
The continuous spectral background with energies
below 155 keV can be generated by the charged parti-
cles that cross the detector close to its edges. The reason
for the growth of the number of counts in the vicinity of
300 keV is not clear yet, because we were unable to
reduce the amplification gain in the spectrometric tract
to observe energies above 300 keV. Nevertheless we
can note that the growth is not only due to possible pile-
up effect because a similar growth is observed in the
spectrum shown in Fig. 4,b where the spectral peak with
energy of 155 keV is missing.
5. SPATIAL DISTRIBUTION
OF SECONDARY PARTICLES
The background arising due to the secondary ultra-
relativistic particle interaction with the detector is the
main obstacle in detailed research of the PXR effect. To
find out an optimal place for the X-ray detector, we per-
formed the measurements of the distribution of such
particles around of the proton beam. The measurements
were performed by the same detector aligned perpen-
dicularly to the proton beam and installed at different
distances from the beam. The experimental layout is
shown in Fig. 7.
Fig. 7. The experimental setup for measurements of the
spatial distribution of the secondary ultra-relativistic
particles in horizontal and vertical directions
In the measurements, we registered the number of
counts in the ionization spectral peak with energy in the
maximum of about 145 keV as a function of the position
of the detector. The measurements were performed for
the same charge of the proton beam registered by the
counter B. The results of the measurements of the num-
ber of counts in the ionization spectral peak after spec-
tral background subtraction are shown in Fig. 8.
The measured spatial distribution of the secondary
particles shows that their intensity is significant up to
the distances of about 2 meters from the proton beam.
The distribution is practically symmetric with respect to
the proton beam trajectory in the horizontal plane. It
means that the secondary particles are produced mainly
in the proton beamline.
Fig. 8. The number of ultra-relativistic charged parti-
cles crossed the detector as a function of the distance
from the proton beam to the detector in horizontal (a)
and vertical (b) directions
6. RESULTS AND DISCUSSION
We succeeded in observation of X-ray radiation ex-
cited by 50 GeV proton beam despite of a strong radia-
tion background. In particular, the clear spectral peaks
of characteristic X-ray radiation from a copper target
and the spectral peak of parametric X-ray radiation
emitted from (111) crystallographic plane of a flat Si
crystal in forward hemisphere in Bragg geometry were
observed. In both cases the spectral peaks were ob-
served on a significant spectral background.
The origin of the radiation background at the proton
accelerator is identified. We found that the background
is mainly due to secondary ultra-relativistic charged
particles like muons and/or pions that are generated in
the proton beamline. Besides, we have measured the
distribution of ionization losses of the secondary parti-
cles in 500 μm Si detector and found that the distribu-
tion is very similar to the well-known Landau distribu-
tion. The measured value of the most probable ioniza-
tion energy loss practically coincides with the calculated
one for ultra-relativistic particles.
This experiment is a basis for forthcoming studies of
properties of the focused PXR emitted by protons in a
bent crystal as well as properties of the PXR emitted by
heavy ions and other kinds of particles like positrons in
crystals.
ISSN 1562-6016. ВАНТ. 2013. №4(86) 319
ACKNOWLEDGEMENTS
The joint research is supported by the directorates of
the IHEP and KIPT. The activity of participants from
Protvino and Kharkov was supported by joint Russian-
Ukrainian Grants by the RFBR Grant № 13-02-90434
(Russia) and by the SFFR Grant № F53.2/107
(Ukraine). The participants from Tomsk acknowledge
the partial support by the Ministry of education and sci-
ence of the Russian Federation grant
№ 14.B37.21.0912.
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3. V.P. Afanasenko et al. Detection of proton paramet-
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Article received 04.06.2013
НАБЛЮДЕНИЕ ПАРАМЕТРИЧЕСКОГО РЕНТГЕНОВСКОГО ИЗЛУЧЕНИЯ, ВОЗБУЖДАЕМОГО
ПРОТОНАМИ С ЭНЕРГИЕЙ 50 ГэВ, И ИДЕНТИФИКАЦИЯ ПРОИСХОЖДЕНИЯ
СПЕКТРАЛЬНОГО ФОНА
А.Г. Афонин, Г.И. Бритвич, Ю.А. Чесноков, П.Н. Чирков, А.А. Дурум, М.Ю. Костин, А.В. Лутчев,
В.А. Маишеев, А.А. Янович, А.В. Щагин, В.И. Трутень, В.Б. Ганенко, И.В. Кириллин, Н.Ф. Шульга,
А.С. Кубанкин, Н.Н. Насонов, А.П. Потылицын, А.С. Гоголев, С.Р. Углов, Ю.М. Черепенников,
П. Каратаев
Описана экспериментальная установка на выведенном пучке ускорителя У70, которая предназначена для
исследований сфокусированного параметрического рентгеновского излучения (ПРИ) и ПРИ, возбуждаемого
релятивистскими ионами и др. частицами. Приведены предварительные результаты измерений спектров
ПРИ и характеристического рентгеновского излучения. Идентифицировано происхождение спектрального
фона, препятствующего исследованиям ПРИ на ускорителе протонов. Измерено и обсуждается распределе-
ние ионизационных потерь релятивистских заряженных частиц в рентгеновском детекторе, подобное рас-
пределению Ландау.
СПОСТЕРЕЖЕННЯ ПАРАМЕТРИЧНОГО РЕНТГЕНІВСЬКОГО ВИПРОМІНЮВАННЯ,
ЩО ЗБУДЖУЄТЬСЯ ПРОТОНАМИ З ЕНЕРГІЄЮ 50 ГеВ, І ІДЕНТИФІКАЦІЯ ПОХОДЖЕННЯ
СПЕКТРАЛЬНОГО ФОНУ
А.Г. Афонін, Г.І. Бритвіч, Ю.А. Чесноков, П.Н. Чірков, А.А. Дурум, М.Ю. Костін, А.В. Лутчев,
В.А. Маішеєв, А.А. Янович, А.В. Щагін, В.І. Трутень, В.Б. Ганенко, І.В. Кириллін, М.Ф. Шульга,
А.С. Кубанкін, M.M. Насонов, А.П. Потилицин, А.С. Гоголєв, С.Р. Углов, Ю.М. Черепенніков,
П. Каратаєв
Описана експериментальна установка на виведеному пучку прискорювача У70, яка призначена для до-
сліджень сфокусованого параметричного рентгенівського випромінювання (ПРВ) і ПРВ, збуджуваного ре-
лятивістськими іонами та ін. частинками. Наведено попередні результати вимірювань спектрів ПРВ і харак-
теристичного рентгенівського випромінювань. Ідентифіковано походження спектрального фону, що пере-
шкоджає дослідженням ПРВ на прискорювачі протонів. Виміряно і обговорюється розподіл іонізаційних
втрат релятивістських заряджених частинок у рентгенівському детекторі, подібний розподілу Ландау.
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| id | nasplib_isofts_kiev_ua-123456789-112152 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1562-6016 |
| language | English |
| last_indexed | 2025-12-07T18:42:49Z |
| publishDate | 2013 |
| publisher | Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
| record_format | dspace |
| spelling | Afonin, A.G. Britvich, G.I. Chesnokov, Yu.A. Chirkov, P.N. Durum, A.A. Kostin, M.Yu. Lutchev, A.V Maisheev, V.A. Yanovich, A.A. Shchagin, A.V. Truten’, V.I. Ganenko, V.B. Kirillin, I.V. Shul’ga, N.F. Kubankin, A.S. Nasonov, N.N. Potylitsyn, A.P. Gogolev, A.S. Uglov, S.R. Cherepennikov, Yu.M. Karataev, P. 2017-01-17T19:11:04Z 2017-01-17T19:11:04Z 2013 Observation of parametric X-ray radiation excited by 50 GeV protons and identification of background radiation origin / A.G. Afonin, G.I. Britvich, Yu.A. Chesnokov, P.N. Chirkov, A.A. Durum, M.Yu. Kostin,A.V. Lutchev, V.A. Maisheev, A.A. Yanovich, A.V. Shchagin, V.I. Truten’,V.B. Ganenko, I.V. Kirillin, N.F. Shul’ga, A.S. Kubankin, N.N. Nasonov,A.P. Potylitsyn, A.S. Gogolev, S.R. Uglov, Yu.M. Cherepennikov, P. Karataev // Вопросы атомной науки и техники. — 2013. — № 4. — С. 315-319. — Бібліогр.: 9 назв. — англ. 1562-6016 PACS: 78.70.–g, 41.60.-m https://nasplib.isofts.kiev.ua/handle/123456789/112152 The experimental layout designed to study properties of focused parametric X-ray radiation generated by relativistic protons in a bent crystal and parametric X-ray radiation generated by relativistic ions and positrons at accelerator U70 is described. Preliminary results of measurements of spectra of characteristic and parametric X-rays observed at 50 GeV proton beam are shown and discussed. The origin of the background radiation that obstacles for detail research of the PXR properties at proton beam is identified. Moreover, the distribution of the ionization losses of relativistic charged particles in the X-ray detector similar to Landau distribution is measured and discussed. Описана експериментальна установка на виведеному пучку прискорювача У70, яка призначена для досліджень сфокусованого параметричного рентгенівського випромінювання (ПРВ) і ПРВ, збуджуваного релятивістськими іонами та ін. частинками. Наведено попередні результати вимірювань спектрів ПРВ і характеристичного рентгенівського випромінювань. Ідентифіковано походження спектрального фону, що перешкоджає дослідженням ПРВ на прискорювачі протонів. Виміряно і обговорюється розподіл іонізаційних втрат релятивістських заряджених частинок у рентгенівському детекторі, подібний розподілу Ландау. Описана экспериментальная установка на выведенном пучке ускорителя У70, которая предназначена для исследований сфокусированного параметрического рентгеновского излучения (ПРИ) и ПРИ, возбуждаемого релятивистскими ионами и др. частицами. Приведены предварительные результаты измерений спектров ПРИ и характеристического рентгеновского излучения. Идентифицировано происхождение спектрального фона, препятствующего исследованиям ПРИ на ускорителе протонов. Измерено и обсуждается распределение ионизационных потерь релятивистских заряженных частиц в рентгеновском детекторе, подобное распределению Ландау. The joint research is supported by the directorates of
 the IHEP and KIPT. The activity of participants from
 Protvino and Kharkov was supported by joint RussianUkrainian
 Grants by the RFBR Grant № 13-02-90434
 (Russia) and by the SFFR Grant № F53.2/107
 (Ukraine). The participants from Tomsk acknowledge
 the partial support by the Ministry of education and science
 of the Russian Federation grant
 № 14.B37.21.0912. en Національний науковий центр «Харківський фізико-технічний інститут» НАН України Вопросы атомной науки и техники Приложения и технологии Observation of parametric X-ray radiation excited by 50 GeV protons and identification of background radiation origin Спостереження параметричного рентгенівського випромінювання, що збуджується протонами з енергією 50 ГеВ, і ідентифікація походження спектрального фону Наблюдение параметрического рентгеновского излучения, возбуждаемого протонами с энергией 50 ГэВ, и идентификация происхождения спектрального фона Article published earlier |
| spellingShingle | Observation of parametric X-ray radiation excited by 50 GeV protons and identification of background radiation origin Afonin, A.G. Britvich, G.I. Chesnokov, Yu.A. Chirkov, P.N. Durum, A.A. Kostin, M.Yu. Lutchev, A.V Maisheev, V.A. Yanovich, A.A. Shchagin, A.V. Truten’, V.I. Ganenko, V.B. Kirillin, I.V. Shul’ga, N.F. Kubankin, A.S. Nasonov, N.N. Potylitsyn, A.P. Gogolev, A.S. Uglov, S.R. Cherepennikov, Yu.M. Karataev, P. Приложения и технологии |
| title | Observation of parametric X-ray radiation excited by 50 GeV protons and identification of background radiation origin |
| title_alt | Спостереження параметричного рентгенівського випромінювання, що збуджується протонами з енергією 50 ГеВ, і ідентифікація походження спектрального фону Наблюдение параметрического рентгеновского излучения, возбуждаемого протонами с энергией 50 ГэВ, и идентификация происхождения спектрального фона |
| title_full | Observation of parametric X-ray radiation excited by 50 GeV protons and identification of background radiation origin |
| title_fullStr | Observation of parametric X-ray radiation excited by 50 GeV protons and identification of background radiation origin |
| title_full_unstemmed | Observation of parametric X-ray radiation excited by 50 GeV protons and identification of background radiation origin |
| title_short | Observation of parametric X-ray radiation excited by 50 GeV protons and identification of background radiation origin |
| title_sort | observation of parametric x-ray radiation excited by 50 gev protons and identification of background radiation origin |
| topic | Приложения и технологии |
| topic_facet | Приложения и технологии |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/112152 |
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