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P 6 S H U T T E R S

P 6 S H U T T E R S. By RICK SPENCE September 6, 2005. INTEGRAL SHUTTER defined : . A device that integrates a white-beam stop, two monochromatic-beam shutters, a safety stop and a collimator into one assembly. P6 Integral Shutter @ 2-BM-A. P6 Shutters at the APS.

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P 6 S H U T T E R S

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  1. P 6 S H U T T E R S By RICK SPENCE September 6, 2005

  2. INTEGRAL SHUTTERdefined: • A device that integrates a white-beam stop, two monochromatic-beam shutters, a safety stop and a collimator into one assembly.

  3. P6 Integral Shutter @ 2-BM-A

  4. P6 Shutters at the APS P6-20 shutter is the original design. • 1-BM-A P6-20 Integral Shutter. • 2-BM-A P6-20 Integral Shutter. • 12-BM-A P6-20 Integral Shutter - locked in mono mode. • 17-BM-A Originally a P6 shutter - locked in mono mode. Significantly modified P6 shutter.

  5. FIGURE 1 • Typical FOE arrangement shown schematically. Copy from paper.

  6. P6-20 INTEGRAL SHUTTER Movable Safety Stop & Collimator First Mono Shutter White beam Photon Stop Second Mono Shutter

  7. P6 Components/function • White Beam Photon Stop – absorbs high power x-rays in mono mode. • (2) Mono-beam Shutters – redundant protection, absorbs mono beam. • Safety Stop – blocks bremsstahlung radiation in mono mode. • Collimator – 18 x 120 mm aperture, passes white or mono beam depending on mode setting. • Kirk-key interlock system - guarantees proper component operation.

  8. Mono ON Mono-beam Bremsstrahlung White beam

  9. White ON White beam

  10. Mono ON Mono OFF White OFF White ON

  11. P6-20 INTEGRAL SHUTTER MATERIALS USED Beam Direction Glid-cop Tungsten inside stainless steel housing Tungsten

  12. P6 Component Specs • White Beam Photon Stop • Can withstand 7-GeV, 300 mA operation. • 2 Mono-beam Shutters • Stopping power ~ 10 Watts • Safety Stop/Collimator • Aperture = 18 mm (h) x 120 mm (w)

  13. KIRK-KEY POSITIONS Mono Beam White Beam

  14. P6 & P4 Integral Shutters

  15. P6 vs. P4 SHUTTERS–Similarities: The P6 shutter is very similar to the P4 shutter. Both are integral shutters & include the same internal components. The P6 and P4 integral shutters were the first shutter used for BM/ID beamlines at the APS, at Sectors 1 & 2.

  16. P6 vs. P4 SHUTTERS -Differences: • P6 – Used in BM beamlines only, P4 – ID only. • White Beam Photon Stop design (P6 – block, P4 – hockey stick) • Collimator opening size (P6 -18x120mm, P4 -18x80mm) • Design Geometry

  17. Reliability of P6 Shutters • Originally designed for 10 years. 1-BM and 2-BM P6 shutters in operation for 10 years and counting. • Shutter Stats (response time) available thru EPICS for not only PS1/PS2 but for other beamline shutters as well. To access from EPICS XFD Display: PSS/IOC Stats/pink tab –IOC Stats/ 01-BM Stats

  18. P6 Shutter Stats via EPICS

  19. Expected failures for P6 shutters (& other shutters) • Failure of seals, resulting in restricted operation and/or vacuum leaks. • Failure of air actuators. • Failure of bellows, resulting in vacuum leaks.

  20. ACKNOWLEDGEMENTS • Mohan Ramanathan • Deming Shu • Ercan Alp • Ali Mashayekhi • Nadia Leyarovska • Ray Monroe • Kevin Beyer • Paper: Design of integral shuttersfor beamlines at the APS. By J.Chang, D.Shu, H.L.Nian, T.M.Kuzay and P.K.Job. Rev. Sci. Instrum. 66 (2), February 1995

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