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on the LEAP conference

on the LEAP conference. Modification of the Pumping System of the Polarized Atomic Beam Source (ABS) at the ANKE facility in COSY- Jülich. by Viplav Gupta IKP/Jülich, Jülich Center for Hadron Physics FZ Jülich, Germany. 14.09.2011.

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on the LEAP conference

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  1. on the LEAP conference Modification of the Pumping System of the Polarized Atomic Beam Source (ABS) at the ANKE facility in COSY- Jülich by Viplav Gupta IKP/Jülich, Jülich Center for Hadron Physics FZ Jülich, Germany 14.09.2011

  2. COoler SYnchrotron ‘COSY’ • Function: Accelerator as well as storage ring for polarized and unpolarized protons and deutrons • Circumference: 184 m • Momenta : 0.295 GeV/c up to 3.65 GeV/c • Currently running experiments : • Internal: ANKE, WASA, PAX • External: TOF • ANKE

  3. ABS at ANKE and mounted pumps Turbopumps in chamber I & II Cryopumps in chamber III, IV, V ABS

  4. Specification of the pumps used at the ABS • Turbo Pumps (Pfeiffer Vacuum) • At chambers I and II • 3*2200 ℓ/s, followed by • 4*260 ℓ/s • and finally diaphragm pumps • Cryo Pumps (Leybold) • At chambers III, IV, and V • 3000 ℓ/s, 1500 ℓ/s and 800 ℓ/s • Compressor Type: RW 4000

  5. Turbo pumps foreseen to replace the cryo pumps(available from earlier installations) 2 * 1600 l/s 1* 1000 l/s 1 * 300 l/s

  6. Flow of molecular H or D gas = 1mbar ℓ/s Turbomolecular Pumps Cryogenic Pumps Vacuum Gauges Power Supply rf Supply ABS pump control unit compressors cryopumps

  7. Motivation of Modifications • Avoid eventual damages to the installed turbopumps • Increase the time for experiments with polarized gas target • Achieve lower power consumption • Reduce the periodic maintenance expenses

  8. 1.Eventual Damages • Space limitations • No gate valves installed to separate the cryopumps during regeneration • Pressure bumps to the turbopumps in the earlier setup • Hence, to avoid damages, cryopumps will be replaced by additional turbopumps.

  9. 2. Increase the time for experiments with polarized gas target • Regeneration of cryopumps is done in a sequential, time consuming process • Time needed for regeneration: 4-5 hours/week • To win over this time for the experiments, replacement is a good feasible option • Beam time is valuable !!

  10. 3) Lower power consumption • Heavy Compressors are used with cryopumps • Compressor type: RW 4000 Rearview of a compressor • 3 cryopumps are replaced, each with a compressor Front view of a compressor

  11. All 3 cryogenic pumps are to be replaced by 4 turbomolecular pumps made available from previous experiments. Thus, power consumption will be decreased by a factor of 12 as a result of the replacement.

  12. 4)Reduction of periodic maintenance expenses • The displacers in the cryopumps have to be replaced every 12-18 months. • Price of a displacer: 1500 € for a small 1000 ℓ/s cryopump 3000 € for a big 3000 ℓ/s cryopump • Turbomolecular pumps donʼt have displacers, they need an oil change every year which costs ≈ €100. Appreciable reduction of maintenance costs !!

  13. Control of the ABS Pumping System • Choosing the proper control system • On the basis of : • Flexibility • Reliability • Long-term availability (choice of commercial system) • Investment • Life cycle costs

  14. Control of the Pumping SystemExamples of hardwares components1) Turbopump Controller: Electronic Drive Unit TCP 600. • Signals • Input to TCP • Shutdown Motor Current • Reset Acknowledge • Output from TCP • K1 Speed OK • K2 Self Test

  15. Control of the Pumping System • 2) Siemens S7-300 Controller Module • Consists of: • A)Power Supply (input 230 V – output 24 V DC) • B) Central Processing Unit (CPU315-2DP) • C) Digital Input and Outputs modules (DI, DO) • D) Communication Processor (CP) Ad B D C

  16. Software Components • WinCC (Windows Control Center) • Man-machine interfacing in automation design • Offers system modules for visualizing, reporting, acquiring and archiving process data • Thanks to the modularity and flexibility new possibilities are open for planning and implementing automation tasks. • Siemens Simatic Step 7-300 • Offers structured project design. • Based on menu with drag and drop, automatic address distribution by the system • On each level consistency check is available, on-line test during the design phase, strong debugging support.

  17. • Program development • On-line debugging • Program download HPT HPT HPT ABS Control System Configuration PLC programming PC: PROCESS CONTROL COMPUTER: • WinXP + WinCC • PROFIBUS-DP Interface (Burn-IN) • GPIB (IEEE 488.2) Interface GPIB (IEEE 488) MPI PROFIBUS (1) GATEWAY SIMATIC S7-300 HF Generator PROFIBUS (2) DIGITAL / ANALOGUE I/O-s RS-232/RS-485 CHANNELS Signal Distributor Box Digital Scope Temperature Regulator DIFFERENT TYPES OF PUMPS VACUUM GAUGE MEASUREMENTS

  18. Current Status • Installation at a test chamber • All components tested successfully • Pressure achieved in the system ≈ 3*10-8 mbar Control system has yet to be installed and checked.

  19. Dhanyawaad Thank you Dankeschön спасибо

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