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P 6 S H U T T E R S

By RICK SPENCE

September 6, 2005

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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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P6 Integral Shutter @ 2-BM-A

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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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FIGURE 1

Typical FOE arrangement shown schematically. Copy from paper.

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P6-20 INTEGRAL SHUTTER

White beamPhoton Stop

FirstMono Shutter

SecondMono Shutter

Movable SafetyStop & Collimator

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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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Bremsstrahlung

White beam

Mono-beam

Mono ON

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White ON

White beam

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Mono OFFMono ON

White OFFWhite ON

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Beam Direction

P6-20 INTEGRAL SHUTTER

MATERIALS USED

Tungsten inside stainless steel

housing Tungsten

Glid-cop

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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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KIRK-KEY POSITIONS

White BeamMono Beam

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P6 & P4 Integral Shutters

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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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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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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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P6 Shutter Stats via EPICS

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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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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