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

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

3. 3 P6 Integral Shutter @ 2-BM-A

4. 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. 5 FIGURE 1  Typical FOE arrangement shown schematically. Copy from paper.

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

7. 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. 8 Bremsstrahlung White beam Mono-beam Mono ON

9. 9 White ON White beam

10. 10 Mono OFFMono ON White OFF White ON

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

12. 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. 13 KIRK-KEY POSITIONS White BeamMono Beam

14. 14 P6 & P4 Integral Shutters

15. 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. 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. 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. 18 P6 Shutter Stats via EPICS

19. 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. 20 ACKNOWLEDGEMENTS  Mohan Ramanathan  Deming Shu  Ercan Alp  Ali Mashayekhi  Nadia Leyarovska  Ray Monroe  Kevin Beyer  Paper: Design of integral shutters for 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