The computer control systems of H⁺ and H⁻ injectors of the Moscow meson factory linac
Technical solutions for the computer control systems which was designed for the proton and H- injectors of the MMF linac are considered. The base of systems is the LabVIEW software. The National Instruments Corp input/output modules are used. Proton injector operator workstation provides the control...
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| Zitieren: | The computer control systems of H⁺ and H⁻ injectors of the Moscow meson factory linac / V.I. Derbilov, A.N. Drugakov, U.V. Kiselev, E.S. Nikulin, A.V. Feschenko, O.T. Frolov, V.P. Yakushev // Вопросы атомной науки и техники. — 2001. — № 5. — С. 128-130. — Бібліогр.: 5 назв. — англ. |
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irk-123456789-790192015-03-25T03:02:38Z The computer control systems of H⁺ and H⁻ injectors of the Moscow meson factory linac Derbilov, V.I. Drugakov, A.N. Kiselev, U.V. Nikulin, E.S. Feschenko, A.V. Frolov, O.T. Yakushev, V.P. Technical solutions for the computer control systems which was designed for the proton and H- injectors of the MMF linac are considered. The base of systems is the LabVIEW software. The National Instruments Corp input/output modules are used. Proton injector operator workstation provides the control (up to 73 channels) of the 400 kV pulse generator, which can operate with repetition rate up to 100 Hz. The control of the ion source which is under high potential (45 channels for H⁺ and 104 for H⁻) is carried out with the help of the fiber line. The analog channels transmission band is up to 1.6 MHz. 2001 Article The computer control systems of H⁺ and H⁻ injectors of the Moscow meson factory linac / V.I. Derbilov, A.N. Drugakov, U.V. Kiselev, E.S. Nikulin, A.V. Feschenko, O.T. Frolov, V.P. Yakushev // Вопросы атомной науки и техники. — 2001. — № 5. — С. 128-130. — Бібліогр.: 5 назв. — англ. 1562-6016 PACS numbers: 29.17.+w, 29.50.+w http://dspace.nbuv.gov.ua/handle/123456789/79019 en Вопросы атомной науки и техники Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine |
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| description |
Technical solutions for the computer control systems which was designed for the proton and H- injectors of the MMF linac are considered. The base of systems is the LabVIEW software. The National Instruments Corp input/output modules are used. Proton injector operator workstation provides the control (up to 73 channels) of the 400 kV pulse generator, which can operate with repetition rate up to 100 Hz. The control of the ion source which is under high potential (45 channels for H⁺ and 104 for H⁻) is carried out with the help of the fiber line. The analog channels transmission band is up to 1.6 MHz. |
| format |
Article |
| author |
Derbilov, V.I. Drugakov, A.N. Kiselev, U.V. Nikulin, E.S. Feschenko, A.V. Frolov, O.T. Yakushev, V.P. |
| spellingShingle |
Derbilov, V.I. Drugakov, A.N. Kiselev, U.V. Nikulin, E.S. Feschenko, A.V. Frolov, O.T. Yakushev, V.P. The computer control systems of H⁺ and H⁻ injectors of the Moscow meson factory linac Вопросы атомной науки и техники |
| author_facet |
Derbilov, V.I. Drugakov, A.N. Kiselev, U.V. Nikulin, E.S. Feschenko, A.V. Frolov, O.T. Yakushev, V.P. |
| author_sort |
Derbilov, V.I. |
| title |
The computer control systems of H⁺ and H⁻ injectors of the Moscow meson factory linac |
| title_short |
The computer control systems of H⁺ and H⁻ injectors of the Moscow meson factory linac |
| title_full |
The computer control systems of H⁺ and H⁻ injectors of the Moscow meson factory linac |
| title_fullStr |
The computer control systems of H⁺ and H⁻ injectors of the Moscow meson factory linac |
| title_full_unstemmed |
The computer control systems of H⁺ and H⁻ injectors of the Moscow meson factory linac |
| title_sort |
computer control systems of h⁺ and h⁻ injectors of the moscow meson factory linac |
| publisher |
Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
| publishDate |
2001 |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/79019 |
| citation_txt |
The computer control systems of H⁺ and H⁻ injectors of the Moscow meson factory linac / V.I. Derbilov, A.N. Drugakov, U.V. Kiselev, E.S. Nikulin, A.V. Feschenko, O.T. Frolov, V.P. Yakushev // Вопросы атомной науки и техники. — 2001. — № 5. — С. 128-130. — Бібліогр.: 5 назв. — англ. |
| series |
Вопросы атомной науки и техники |
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| fulltext |
THE COMPUTER CONTROL SYSTEMS OF H+ AND H- INJECTORS
OF THE MOSCOW MESON FACTORY LINAC
V.I. Derbilov, A.N. Drugakov, U.V. Kiselev, E.S. Nikulin, A.V. Feschenko,
O.T. Frolov, V.P. Yakushev
Institute for Nuclear Research, RAS,
117312, 60thOct.Anniversary pr. 7a, Moscow, Russia
nikulin@al20.inr.troitsk.ru
Technical solutions for the computer control systems which was designed for the proton and H- injectors of the
MMF linac are considered. The base of systems is the LabVIEW software. The National Instruments Corp
input/output modules are used. Proton injector operator workstation provides the control (up to 73 channels) of the
400 kV pulse generator, which can operate with repetition rate up to 100 Hz. The control of the ion source which is
under high potential (45 channels for H+ and 104 for H-) is carried out with the help of the fiber line. The analog
channels transmission band is up to 1.6 MHz.
PACS numbers: 29.17.+w, 29.50.+w
The concept of a computer control system (CCS) is
developed within the framework of the H- injector de-
sign [1]. There are two modular groups in the injector
structure: the high-voltage pulse generator (HVPG) and
ion source (IS) with auxiliary technological systems.
The CCS structure is also parted into two independent
parts. The H- injector HVPG is identical to the H+ injec-
tor HVPG. The H- IS is more complex than the H+ one.
The list of CCS signals of H-/H+ injectors is given in Ta-
ble 1.
The CCS is created on the basis of the LabVIEW
software package in Windows medium. It allows easily
to compose from separate devices more composite vir-
tual devices and gradually to increase structure complex
control opportunities. The modifications and develop-
ment of structural connections between program blocks
are facilitated. The graphic language "G" from the pack-
age gives doubtless conveniences to the developers. It is
accessible for mastering even by operating staff which
is not having the programming skills. The example of
the signal transmission and processing program module
for the HVPG divider, stabilization system and current
measuring device unit are given in Fig. 2.
Let's consider a design feature and details of the
CCS hardware complex.
Fig. 1. The H- injector flowchart.
ВОПРОСЫ АТОМНОЙ НАУКИ И ТЕХНИКИ. 2001. №5.
Серия: Ядерно-физические исследования (39), с. 128-130.
128
Table 1. The H-/H+ injectors information signals array.
Block / subsystem measuring channels control channels
Analogue
Video DC Discrete counter Analogue discrete timer
Magnet Power Supply Unit 1/1 1/1 1/1
H2 leak-in pulsed valve PSU 1/- 1/- 1/- 2/-
Hydrogen leak-in unit -/1 -/1
Caesium heater block 1/- 1/- 1/-
Focusing voltage source 1/1 1/1 5/5 1/1 2/2
Discharge current generator 1/1 2/2 5/5 1/1 2/2 2/2
Extracting voltage source 3/3 5/5 1/1 2/2
50/400Hz current transducer 1/1
400/50Hz current transducer 1/1
SCXI chassis 1/1
Delay pulse generator 1/- 6/2
Interlocks 2/2 2/2
Pumping-out complex 14/- 2/- 4/-
24V power supply 1/1
Beam profile measuring device 10/10 1/1
Beam current measuring device 1/1
Emittance measuring device 20/20 4/4 3/3
Anode heater 1/- 1/- 1/-
Cathode heater 1/1 1/1 1/1
Air cooling 2/2
HVPG 3/3 22/22 1/1 4/4 6/6 4/4
Vacuum system 2/1 4/2 2/-
Water cooling 1/1 1/1 1/1
Pneumosystem 1/- 2/- 2/-
TOTAL 36/36 15/11 73/53 3/1 12/10 27/19 18/12
Fig. 2. The block-diagram of the beam current and a high-voltage pulse signals transmission and process-
ing program module.
The central console - the operator workstation - is
based on the P-III/800 processor and has a data exchan-
ge opportunity to the Ethernet protocol with other con-
trol linac posts by a local network with throughput
ВОПРОСЫ АТОМНОЙ НАУКИ И ТЕХНИКИ. 2001. №5.
Серия: Ядерно-физические исследования (39), с. 129-130.
129
100 Mb/s. Built-in in the workstation system block the
PCI-1200 and PCI-MIO-16E1 multifunctional
input/output devices [2] provide the HVPG and auxil-
iary systems control by means of cable communication
links. 28 12-bit analogue channels with a programmed
coefficient of amplification (0.01÷10V + 0.025%) and
transmission band up to 1.6 MHz (24 ADC, 4 DAC), 40
TTL-input/output channels, 5 counter/timer channels
(with precision 10 ns) in total are accessible. The con-
trolled devices of the HVPG and auxiliary systems are
as follows: - 15 kV and 7 kV rectifiers; the thyratrons
discharge rack; compensation and stabilization systems;
interlock and protection devices; auxiliary systems,
units and blocks, including power supply systems, co-
oling and ventilation, vacuum, compressed air delivery
system and differential evacuation complex for vacuum
tube, hydrogen delivery pipe-line (HDM), an accelerat-
ing tube divider circulation and cooling system (DCCS),
beam diagnostics block etc.
Through a RS232 port the workstation is interlinked
to the IS which is taking place under potential 400 kV,
with the help of the fiber link. Length of a line –
100 meters. As modems the ROM-210 transformers are
applied [3].
The controlled IS devices are: discharge current ge-
nerator (DCG); focusing (FVS) and extracting (EVS)
voltage power supply; magnet power supply units
(MSU) and pulsed valve unit (PVU); 6-channel gene-
rator of delayed pulses (DPG); caesium, cathode and an-
ode heaters (CSH, CTH, ANH); a differential evacua-
tion vacuum complex; auxiliary units and measuring
blocks. Allocated inside the shield of the IS the subsys-
tem of control is based on the SCXI-1001 microproces-
sor chassis. The modules, built-in in the chassis, ADC
SCXI-1124, DAC SCXI-1140, relay SCXI-1160, and
multifunctional SCXI-1200 [4] provide 34 analogue
channels, 48 discrete; 6 counter/timer channels. Besides
there are up to 16 relay channels for load control with
currents of switching up to 2 A at a voltages up to
250 Vrms. It is possible to insert into the chassis basket
additional modules (up to 12). The part of channels is
reserved.
The system SCXI with the help of sampling-storage
buffer device stores the information during an injector
pulse (200 µs) and dumps it on the operator workstation
by a fiber line during 10 ms before the beginning of the
next pulse. The information goes in both directions
through the multiplexer and the SCXI-2400 connection
module [5] RS232 port.
The workstation system block RAM (256 Mb) stores
a previous injector operation history for the subsequent
analysis. In order to prevent RAM overflow the differ-
ence information between the ion current sequential
pulses is inserted to the storage buffer only and the in-
jector subsystems status changes are fixed. System is
dumping the accumulated information in archive period-
ically.
System noise stability and protection are provided at
different levels with a particular circuit and constructive
solutions set. Among them, except for the mentioned
above fiber optics, it is possible to mark buffer devices,
in function of which the signals normalization and coor-
dination, channels protection against overloads and
noises filtration enter. The input/output modules main-
tain input overloads up to 42 V, and if equipped by ter-
minal blocks - up to 250 V. The selection of modules
with the inlet optical insulation is possible also.
The SCXI chassis is in unfavorable operating condi-
tions: near IS powerful high-voltage pulsed devices, at a
boosted ionizing radiation. The chassis exterior shield-
ing is used in addition.
The linac sessions duration can take some weeks.
The uninterruptible power supplies (UPS) are applied
for system viability maintenance in long-lived operation
sessions.
In Fig. 3 the result of transmission and processing in
real time for the 3 information channel signals is given.
Program module of this CCS fragment is mentioned
above in Fig. 2. The H- injector CCS has about 180 local
transmission channels, plus the linac local network area
channel, and disposes of a further expansion opportuni-
ty. Large volume of the output information requires the
adequate screen space.
Fig. 3. Workstation monitor data display of the
beam current and H+ injector high-voltage pulse top
signal transmission and processing results.
The DualHead videocard separates and outputs
HVPG and IS information massifs on two different mo-
nitors. Usage in the workstation of two synchronized
system blocks enables the information streams addition-
al separation, and also duplication and control functions
interception by other computer if one of them will be in
failure. Such solution is well conformed and with the
corporations-manufacturers guidelines to un-overload
the computer system bus with a plenty of additional de-
vices. It can become the reason of interruption system
(IRQ) conflicts and programs "hovering".
The CCS can make unit deletions without assistance
in critical situations.
The CCS gives new qualities and implements tech-
nologies unavailable earlier. Using CCS it is possible to
solve extreme regulation problems, to build new beam
energy stabilization systems, to robotize optimization of
parameters.
REFERENCES
1. A.N.Anikeichik et al. // Voprosy Atomnoj Nauki i
Tekhniki, Seriya: TFEh (27). 1986, v. 1, p. 12.
2. National Instruments Corp. The Measurement and
Automation Catalog 2000. pp. 226-228, 250.
3. http://www.nnz-ipc.ru.
ВОПРОСЫ АТОМНОЙ НАУКИ И ТЕХНИКИ. 2001. №5.
Серия: Ядерно-физические исследования (39), с. 130-130.
130
4. National Instruments Corp. The Measurement and
Automation Catalog 2000. pp. 354, 372, 377, 386,
389.
5. Ibid, p. 389.
ВОПРОСЫ АТОМНОЙ НАУКИ И ТЕХНИКИ. 2001. №5.
Серия: Ядерно-физические исследования (39), с. 131-130.
131
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