Microcontroller system of hydrogen pulse injection on stellarator Uragan-3М
This paper describes a renewed system of pulse injection of working gas into the vacuum vessel of the stellarator Uragan -3М. The system was designed and fabricated in the Institute of Plasma Physics of NSC “Kharkov Institute of Physics and Technology” and is intended for providing of the fast-actin...
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| Опубліковано в: : | Вопросы атомной науки и техники |
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| Дата: | 2015 |
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| Мова: | Англійська |
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Національний науковий центр «Харківський фізико-технічний інститут» НАН України
2015
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Microcontroller system of hydrogen pulse injection on stellarator Uragan-3М / S.P. Gubarev, V.B. Korovin, V.M. Listopad, A.V. Lozin, Yu.K. Mironov, G.P. Opaleva, V.S. Romanov, V.S. Taran, N.V. Zamanov, .I. Zolototrubova // Вопросы атомной науки и техники. — 2015. — № 1. — С. 283-285. — Бібліогр.: 2 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1859668374984851456 |
|---|---|
| author | Gubarev, S.P. Korovin, V.B. Listopad, V.M. Lozin, A.V. Mironov, Yu.K. Opaleva, G.P. Romanov, V.S. Taran, V.S. Zamanov, N.V. Zolototrubova, M.I. |
| author_facet | Gubarev, S.P. Korovin, V.B. Listopad, V.M. Lozin, A.V. Mironov, Yu.K. Opaleva, G.P. Romanov, V.S. Taran, V.S. Zamanov, N.V. Zolototrubova, M.I. |
| citation_txt | Microcontroller system of hydrogen pulse injection on stellarator Uragan-3М / S.P. Gubarev, V.B. Korovin, V.M. Listopad, A.V. Lozin, Yu.K. Mironov, G.P. Opaleva, V.S. Romanov, V.S. Taran, N.V. Zamanov, .I. Zolototrubova // Вопросы атомной науки и техники. — 2015. — № 1. — С. 283-285. — Бібліогр.: 2 назв. — англ. |
| collection | DSpace DC |
| container_title | Вопросы атомной науки и техники |
| description | This paper describes a renewed system of pulse injection of working gas into the vacuum vessel of the stellarator Uragan -3М. The system was designed and fabricated in the Institute of Plasma Physics of NSC “Kharkov Institute of Physics and Technology” and is intended for providing of the fast-acting dosed injection of hydrogen by the given algorithm. A distinctive feature of the developed system is the use of designed microprocessor-based controller to control the operation of the piezoelectric valve.
Описана разработанная в Институте физики плазмы ННЦ ХФТИ обновленная система импульсного напуска рабочего газа на установке Ураган-3М. Система предназначена для обеспечения быстродействующего дозированного напуска водорода по заранее заданной программе. Отличительной особенностью системы является использование разработанного микропроцессорного контроллëра для управления работой пьезоэлектрического клапана.
Описана розроблена в Інституті фізики плазми ННЦ ХФТІ оновлена система імпульсного напуску робочого газу на установці Ураган-3М. Система призначена для забезпечення швидкодіючого дозованого напуску водню за заздалегідь заданою програмою. Відмінною особливістю системи є використання розробленого мікропроцесорного контролера для управління роботою п'єзоелектричного клапана.
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| first_indexed | 2025-11-30T12:37:34Z |
| format | Article |
| fulltext |
ISSN 1562-6016. ВАНТ. 2015. №1(95)
PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. 2015, №1. Series: Plasma Physics (21), p. 283-285. 283
MICROCONTROLLER SYSTEM OF HYDROGEN PULSE INJECTION
ON STELLARATOR URAGAN-3М
S.P. Gubarev, V.B. Korovin, V.M. Listopad, A.V. Lozin, Yu.K. Mironov,
G.P. Opaleva, V.S. Romanov, V.S. Taran, N.V. Zamanov,
M.I. Zolototrubova
Institute of Plasma Physics of the NSC KIPT, Kharkov, Ukraine
E-mail: gubarev@kipt.kharkov.ua
This paper describes a renewed system of pulse injection of working gas into the vacuum vessel of the stellarator
Uragan -3М. The system was designed and fabricated in the Institute of Plasma Physics of NSC “Kharkov Institute
of Physics and Technology” and is intended for providing of the fast-acting dosed injection of hydrogen by the
given algorithm. A distinctive feature of the developed system is the use of designed microprocessor-based
controller to control the operation of the piezoelectric valve.
PACS: 52.70.Ds; 52.70.Kz.
INTRODUCTION
In the experiments on magnetic plasma confinement
important is the control for the dosed injection of
working gas into the vessel volume of the device. As a
rule, the gas has to be injected according to the
preliminary formulated program. Recently in the
Institute of Plasma Physics of NSC Kharkov Institute of
Physics and Technology, to satisfy requirements of a
working plan for U-3M experiments, a system of
working gas pulsed injection was developed and
fabricated. It has several advantages compared to the
previously described construction [1].
1. EXPERIMENT DEVICE
This system uses a piezoelectric valve model PEV-1
produced by the American firm Key High Vacuum
Products.
The features of the valve:
Level of injection 0…500 [sccm] – (standard
cubic сcentimeters per min);
Level of loss at closing < 1·10
-9
sccm / (1 atm He
at the input);
Time of response (reacting) – 2 ms;
Мах entrance pressure – 50 psi;
Requirements for the control signals - U=0…100
V, I≤10 mkA;
Max operation voltage – 100 VDC;
Range of working temperatures of +10 to
+60 °C.
The valve is disposed outside of the vacuum
chamber, and into the chamber the gas is fed by means
of 2 m stainless tube with 18 mm inner diameter. Gas
injection is located near the frame type antenna used for
RF plasma produce (RF generator Kascad-1).
A distinctive feature of the developed system is the
use of designed microprocessor-based controller to
control the operation of the piezoelectric valve. Its
photo is shown in Fig. 1.
Fig. 1. Appearance of microcontroller system of
hydrogen pulse injection
It is implemented on the basis of microcontroller
series PIC18FK manufactured by Microchip
Technology Inc. [2]. The controller provides the
function of operational settings of the working gas
injection , the operation mode selection, synchronization
with other systems of the experimental installation and
visualization of injection process as a graphical
mnemonic scheme. The block diagram of the developed
microprocessor controller is shown in Fig. 2.
Fig. 2. Block diagram of microcontroller system
pulsed hydrogen injection
The system uses the following hardware modules
(see Fig. 2):
Charge Time Measurement Unit (CTMU)
works in conjunction with the A/D Converter;
284 ISSN 1562-6016. ВАНТ. 2015. №1(95)
12-bit Analog-to-Digital (A/D) Converter
module;
Capture/ Compare/ Pulse-Width Modulation
(PWM) module;
Timer 0, Timer 1 and Timer 2 modules;
EEPROM.
Work of the CPU is synchronized by clock
generator. The required parameters of the signal control
and opening valve are provided by PWM module
(Fig. 3). Pulse width and pause entered by the operator
via the touch panel and displayed on the LCD. It is
possible to display information in two rows of twenty
characters.
Fig. 3. Examples of waveforms of PWM
To perform the required functions of the
microcontroller, the original software was designed. To
provide successive operation of hardware modules, the
software system consists of the main program and a set
of routines:
subroutine of configuration and control of
charge time;
measurement unit (CTMU);
subroutine of ADC module configuration and
control;
subroutine of PWM settings and control;
subroutine of timers 0, 1 and 2 configuration
and control;
subprogram for saving in a nonvolatile memory
(NVRAM);
EPROM.
The main program coordinates all program modules.
Subroutine of setting and control of the pulse width
modulator (PWM) defines the mode of hardware
module operation and the parameters of the output
signal. Subroutine of control turns on the PWM in a
requested time.
Subroutine for configuration and control of analog-
to-digital converter (ADC) sets the speed of conversion,
the destination data format, the active channel number,
and triggers the process of data conversion. Thereafter,
control subroutine reads the data of an active channel.
A distinctive feature of the developed controller
design is the use of touch controls. It is connected with a
sufficiently large number of required input parameters
defined by buttons and switches. Taking into account
small size of the controller enclosure (157 mm × 95 mm
× 53 mm) and the expected expansion of the feature set
of the controller in future (registration of plasma
response to the injection of hydrogen), which would
entail an increase in the number of controls the use of he
touch panel can be considered as the best solution. Such
design is inexpensive and allows to increase simply the
number of sensor pads in the condition of limited space.
For these purposes the company Microchip Technology
Inc. produces a number of microcontrollers including an
inexpensive 18-series. Required functions for the
system are provided by microcontroller PIC18F25K80.
The Charge Time Measurement Unit (CTMU) is
integrated into microcontroller crystal, it can measure
relative changes of capacitance in specific time delay.
The CTMU works in conjunction with the A/D
Converter to provide time or charge measurement .The
CTMU is ideal for interfacing with capacitive-based
sensors. The principle of operation of such module is to
measure a changing of voltage level at the ADC input.
The signal at the input of the ADC has a sawtooth
shape (Fig. 4). This is the result of changes of the
voltage drop across the resistance of the input circuits of
the ADC during charging input capacitance by fixed
current (0.55…550 μA), produced by CTMU module
for a fixed time (tens of microseconds). When one
touches the touch pad, the total input capacitance, and
hence the time of charging, are increased. The
corresponding values of voltage difference will be
deciphered by the loaded program as touching the touch
pad.
Fig. 4. СТМU
All three timers operate in interrupt mode. Setting
subroutines of timers set modes and interrupt response
time. Subroutine of control is carried out on / off timers
and handles interrupts. Timer 0 sets the frequency of the
survey, which checks whether the change in the charge
of the capacitor occurred. Timer 1 is used for setting
high-precision pulse parameters for switching on the
valve of hydrogen injection. If special accuracy is not
necessary, the Timer 2 is used; it configures signal
shape and starts the PWM.
The program of the data saving in the non-volatile
EEPROM memory writes the pulse parameters of
switching on the hydrogen injection valve. All software
modules were created in the development environment
MPLAB IDE on a specialized high-level language C18,
which was created for programming microcontrollers of
18 Series.
ISSN 1562-6016. ВАНТ. 2015. №1(95) 285
Executable program for control of pulsed gas
injection system was loaded into the memory of the
microcontroller. Loading and reprogramming the
microcontroller is performed by means of in-circuit
debugger ICD 2 of Microchip Technology.
Tests of hydrogen pulse injection were carried out
under various pressure values in the U-3M chamber and
with different levels of pressure at the valve input.
Fig. 5. The signals of some plasma diagnostics with
hydrogen injection
Special tests were provided to determine the
minimum pulse width of valve control sufficient for its
sustainable operations. As a result of these tests the
response time of gas injection system was found, equals
to 20…40 ms under various conditions. Such quite a
long response time is caused by the length of pipelines
and the valve construction. Due to this, when operating
at pressures 10
-4
…10
-5
Torr, it is necessary to increase
the closing force of the valve, what, naturally, increases
the inertia of the entire system. Since without additional
control the level of leakage through the normally closed
valve was high (above than in the passport) and changed
the total pressure in the chamber, it was also determined
the optimum pressure at the valve injection
Ph = 0.65 atm and the minimum width of control pulse
τ = 20 ms.
The signals of some U-3М plasma diagnostics of the
discharge number 117 during hydrogen injection using a
piezoceramic valve are shown in Fig. 5.
CONCLUSIONS
Application of microcontroller allowed to create a
compact and easy to use device for precise control
system of pulse hydrogen injection for stellarator
Uragan-3М. The details of the work of some units of the
microcontroller are described, what can be useful for
specialists engaged in developing instrumentation for
scientific purposes.
REFERENCES
1. V.E. Moiseenko, V.L. Berezhnyj, V.N. Bondarenko,
et al. RF plazma production and heating below ion-
cyclotron frequencies in Uragantorsatrons // Nucl.
Fusion. 2011, v. 51, p. 083036.
2. http://www.microchip.com.
Article received 20.12.2014
МИКРОКОНТРОЛЛËРНАЯ СИСТЕМА ИМПУЛЬСНОГО НАПУСКА ВОДОРОДА
НА СТЕЛЛАРАТОРЕ УРАГАН-3М
С.П. Губарев, В.Б. Коровин, В.М. Листопад, А.В. Лозин, Ю.К. Миронов, Г.П. Опалева, В.С. Романов,
В.С. Таран, Н.В. Заманов, М.И. Золототрубова
Описана разработанная в Институте физики плазмы ННЦ ХФТИ обновленная система импульсного
напуска рабочего газа на установке Ураган-3М. Система предназначена для обеспечения
быстродействующего дозированного напуска водорода по заранее заданной программе. Отличительной
особенностью системы является использование разработанного микропроцессорного контроллëра для
управления работой пьезоэлектрического клапана.
МІКРОКОНТРОЛЕРНА СИСТЕМА ІМПУЛЬСНОГО НАПУСКУ ВОДНЮ НА СТЕЛАРАТОРІ
УРАГАН-3М
С.П. Губарєв, В.Б. Коровін, М.М. Козуля, В.М. Листопад, А.В. Лозін, Ю.К. Міронов, Г.П. Опалєва,
Р.О. Павліченко, В.С. Романов, В.С. Таран, Н.В. Заманов, М.І. Золототрубова
Описана розроблена в Інституті фізики плазми ННЦ ХФТІ оновлена система імпульсного напуску
робочого газу на установці Ураган-3М. Система призначена для забезпечення швидкодіючого дозованого
напуску водню за заздалегідь заданою програмою. Відмінною особливістю системи є використання
розробленого мікропроцесорного контролера для управління роботою п'єзоелектричного клапана.
|
| id | nasplib_isofts_kiev_ua-123456789-82251 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1562-6016 |
| language | English |
| last_indexed | 2025-11-30T12:37:34Z |
| publishDate | 2015 |
| publisher | Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
| record_format | dspace |
| spelling | Gubarev, S.P. Korovin, V.B. Listopad, V.M. Lozin, A.V. Mironov, Yu.K. Opaleva, G.P. Romanov, V.S. Taran, V.S. Zamanov, N.V. Zolototrubova, M.I. 2015-05-27T10:12:48Z 2015-05-27T10:12:48Z 2015 Microcontroller system of hydrogen pulse injection on stellarator Uragan-3М / S.P. Gubarev, V.B. Korovin, V.M. Listopad, A.V. Lozin, Yu.K. Mironov, G.P. Opaleva, V.S. Romanov, V.S. Taran, N.V. Zamanov, .I. Zolototrubova // Вопросы атомной науки и техники. — 2015. — № 1. — С. 283-285. — Бібліогр.: 2 назв. — англ. 1562-6016 PACS: 52.70.Ds; 52.70.Kz. https://nasplib.isofts.kiev.ua/handle/123456789/82251 This paper describes a renewed system of pulse injection of working gas into the vacuum vessel of the stellarator Uragan -3М. The system was designed and fabricated in the Institute of Plasma Physics of NSC “Kharkov Institute of Physics and Technology” and is intended for providing of the fast-acting dosed injection of hydrogen by the given algorithm. A distinctive feature of the developed system is the use of designed microprocessor-based controller to control the operation of the piezoelectric valve. Описана разработанная в Институте физики плазмы ННЦ ХФТИ обновленная система импульсного напуска рабочего газа на установке Ураган-3М. Система предназначена для обеспечения быстродействующего дозированного напуска водорода по заранее заданной программе. Отличительной особенностью системы является использование разработанного микропроцессорного контроллëра для управления работой пьезоэлектрического клапана. Описана розроблена в Інституті фізики плазми ННЦ ХФТІ оновлена система імпульсного напуску робочого газу на установці Ураган-3М. Система призначена для забезпечення швидкодіючого дозованого напуску водню за заздалегідь заданою програмою. Відмінною особливістю системи є використання розробленого мікропроцесорного контролера для управління роботою п'єзоелектричного клапана. en Національний науковий центр «Харківський фізико-технічний інститут» НАН України Вопросы атомной науки и техники Диагностика плазмы Microcontroller system of hydrogen pulse injection on stellarator Uragan-3М Микроконтроллëрная система импульсного напуска водорода на стеллараторе Ураган-3М Мікроконтролерна система імпульсного напуску водню на стелараторі Ураган-3М Article published earlier |
| spellingShingle | Microcontroller system of hydrogen pulse injection on stellarator Uragan-3М Gubarev, S.P. Korovin, V.B. Listopad, V.M. Lozin, A.V. Mironov, Yu.K. Opaleva, G.P. Romanov, V.S. Taran, V.S. Zamanov, N.V. Zolototrubova, M.I. Диагностика плазмы |
| title | Microcontroller system of hydrogen pulse injection on stellarator Uragan-3М |
| title_alt | Микроконтроллëрная система импульсного напуска водорода на стеллараторе Ураган-3М Мікроконтролерна система імпульсного напуску водню на стелараторі Ураган-3М |
| title_full | Microcontroller system of hydrogen pulse injection on stellarator Uragan-3М |
| title_fullStr | Microcontroller system of hydrogen pulse injection on stellarator Uragan-3М |
| title_full_unstemmed | Microcontroller system of hydrogen pulse injection on stellarator Uragan-3М |
| title_short | Microcontroller system of hydrogen pulse injection on stellarator Uragan-3М |
| title_sort | microcontroller system of hydrogen pulse injection on stellarator uragan-3м |
| topic | Диагностика плазмы |
| topic_facet | Диагностика плазмы |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/82251 |
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