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1 P 6 S H U T T E R S By RICK SPENCE September 6, 2005
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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.
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3 P6 Integral Shutter @ 2-BM-A
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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.
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5 FIGURE 1 Typical FOE arrangement shown schematically. Copy from paper.
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6 P6-20 INTEGRAL SHUTTER White beam Photon Stop First Mono Shutter Second Mono Shutter Movable Safety Stop & Collimator
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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.
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8 Bremsstrahlung White beam Mono-beam Mono ON
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9 White ON White beam
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10 Mono OFFMono ON White OFF White ON
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11 Beam Direction P6-20 INTEGRAL SHUTTER MATERIALS USED Tungsten inside stainless steel housing Tungsten Glid-cop
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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)
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13 KIRK-KEY POSITIONS White BeamMono Beam
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14 P6 & P4 Integral Shutters
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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.
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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
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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
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18 P6 Shutter Stats via EPICS
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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.
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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
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