| Paper |
Title |
Page |
| THP023 |
Fiber Optic Control for Electron Gun Power Supplies of 3MeV DC Accelerator
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1 |
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- R. B. Chavan, K. Dixit, K. C. Mittal, V. Yadav
BARC-EBC, Mumbai
- B. S. Israel, K. Nanu, R. N. Rajan
BARC, Mumbai
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A 3MeV, 10mA DC Industrial Electron Beam Accelerator is being developed at Electron Beam Centre, Navi Mumbai. The electron beam is generated by a triode electron gun and injected into the accelerating column at 5 keV. The gun and its power supplies, i.e.5kV anode, '3kV grid and 15V/20A (filament), are floating at 3 Million volts, and are situated in a tank which is pressurized with SF6 at 6kg/cm2. These power supplies are required to be controlled remotely. For this purpose, control system using ADAM modules and Optical fiber has been designed and developed. One set of control modules is situated inside the pressure vessel and is floating at 3MeV. The other set of modules is placed at ground potential at the bottom of the pressure vessel. Communication between the two sets of modules is through optical fiber. The module at ground potential convert's RS-485 signal to optical signal. Software was developed in Visual Basic using CWSerial ActiveX control. The system has been successfully tested on the gun power supplies and for high-pressure operation at 6kg/cm2. This paper discusses the design aspects, circuit details and testing of the control system.
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| THP049 |
Distributed Control System for an Industrial Electron Accelerator
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1 |
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- V. Sharma, K. C. Mittal
BARC-EBC, Mumbai
- S. Acharya
BARC, Mumbai
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A distributed input/output based, distributing control system has been for an indigenously developed 500 keV electron accelerator. The monitoring and control of each subsystem is assigned to an individual micro-controller. The processors are connected on a CAN network to communicate with each other for decision-making. Each processor incorporates a user configurable program. Each processor communicates with standard peripheral input/output modules to control inputs/outputs of the subsystem. For user program configuration on chip flash memory of the processor has been reserved. The processor can be configured by entering the control flow data on a Microsoft Excel Sheet in .CSV format and transferring it to the processor using PC. Programming using the data entry in an Excel Sheet makes it easy for the user to program a processor without knowing any programming language. The use of distributed multiple processors reduces the wiring, maintenance hence reducing the downtime of the machine. Each processor is provided with a local Touch Screen as user-friendly man-machine interface.
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