FETS Pepperpot Simon Jolly 10 th February 2010. The Pepperpot Beam segmented by intercepting screen...
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Transcript of FETS Pepperpot Simon Jolly 10 th February 2010. The Pepperpot Beam segmented by intercepting screen...
![Page 1: FETS Pepperpot Simon Jolly 10 th February 2010. The Pepperpot Beam segmented by intercepting screen with regular array of holes. Beamlets drift short.](https://reader035.fdocuments.in/reader035/viewer/2022062809/5697bf741a28abf838c7f9c3/html5/thumbnails/1.jpg)
FETS Pepperpot
Simon Jolly10th February 2010
![Page 2: FETS Pepperpot Simon Jolly 10 th February 2010. The Pepperpot Beam segmented by intercepting screen with regular array of holes. Beamlets drift short.](https://reader035.fdocuments.in/reader035/viewer/2022062809/5697bf741a28abf838c7f9c3/html5/thumbnails/2.jpg)
The Pepperpot• Beam segmented by
intercepting screen with regular array of holes.
• Beamlets drift short distance before producing image on scintillator screen.
• Support block prevents beamlets from overlapping and provides cooling.
• CCD camera records image of light spots.
• Calculate emittance from spot distribution.
10/02/10 Simon Jolly, Imperial College 2
Incoming Beam
Intercepting screen
Support block
Scintillator screen
Beamlets
Fast CCD Camera
![Page 3: FETS Pepperpot Simon Jolly 10 th February 2010. The Pepperpot Beam segmented by intercepting screen with regular array of holes. Beamlets drift short.](https://reader035.fdocuments.in/reader035/viewer/2022062809/5697bf741a28abf838c7f9c3/html5/thumbnails/3.jpg)
FETS Pepperpot Design
10/02/10 Simon Jolly, Imperial College 3
Vacuum bellows
Camera
Moving rod
Shutter
Mounting flange
Pepperpot head
Bellows
Tungsten mesh
Beam profile head
![Page 4: FETS Pepperpot Simon Jolly 10 th February 2010. The Pepperpot Beam segmented by intercepting screen with regular array of holes. Beamlets drift short.](https://reader035.fdocuments.in/reader035/viewer/2022062809/5697bf741a28abf838c7f9c3/html5/thumbnails/4.jpg)
Pepperpot and Slit-Slit Scanners
10/02/10 Simon Jolly, Imperial College 4
![Page 5: FETS Pepperpot Simon Jolly 10 th February 2010. The Pepperpot Beam segmented by intercepting screen with regular array of holes. Beamlets drift short.](https://reader035.fdocuments.in/reader035/viewer/2022062809/5697bf741a28abf838c7f9c3/html5/thumbnails/5.jpg)
Calibration System• Need to produce 4 light
spots on scintillator screen for calibration.
• Bring in 4 optical fibres through spare holes in copper mounting block.
• Fibre stops a little way short of scintillator screen, mounted in centre of 2mm x 13mm glass dowel.
• Glass dowel is frosted on scintillator screen end.
• Light from fibre produces 1mm spot on frosted end of glass dowel ie. at scintillator screen.
• Spots are imaged for calibration.
10/02/10 Simon Jolly, Imperial College 5
Scintillator screen
Copper mounting block
Fast CCD Camera
To light source
![Page 6: FETS Pepperpot Simon Jolly 10 th February 2010. The Pepperpot Beam segmented by intercepting screen with regular array of holes. Beamlets drift short.](https://reader035.fdocuments.in/reader035/viewer/2022062809/5697bf741a28abf838c7f9c3/html5/thumbnails/6.jpg)
Pepperpot Head
10/02/10 Simon Jolly, Imperial College 6
FETS pepperpot uses tungsten intercepting screen with 50 micron holes on 3 mm pitch, 10 mm drift and quartz scintillator.
![Page 7: FETS Pepperpot Simon Jolly 10 th February 2010. The Pepperpot Beam segmented by intercepting screen with regular array of holes. Beamlets drift short.](https://reader035.fdocuments.in/reader035/viewer/2022062809/5697bf741a28abf838c7f9c3/html5/thumbnails/7.jpg)
Pepperpot Head: Mounting Holes
10/02/10 Simon Jolly, Imperial College 7
FETS pepperpot uses tungsten intercepting screen with 50 micron holes on 3 mm pitch, 10 mm drift and quartz scintillator.Tungsten screen and copper mounting blocks are aligned with 4 2mm x 13mm metal dowels.
![Page 8: FETS Pepperpot Simon Jolly 10 th February 2010. The Pepperpot Beam segmented by intercepting screen with regular array of holes. Beamlets drift short.](https://reader035.fdocuments.in/reader035/viewer/2022062809/5697bf741a28abf838c7f9c3/html5/thumbnails/8.jpg)
Pepperpot Head: Calibration Holes
10/02/10 Simon Jolly, Imperial College 8
FETS pepperpot uses tungsten intercepting screen with 50 micron holes on 3 mm pitch, 10 mm drift and quartz scintillator.Tungsten screen and copper mounting blocks are aligned with 4 2mm x 13mm metal dowels.
4 spare 2mm dowel holes to be used for fibre optic calibration
Fibres come in from back side of head.
![Page 9: FETS Pepperpot Simon Jolly 10 th February 2010. The Pepperpot Beam segmented by intercepting screen with regular array of holes. Beamlets drift short.](https://reader035.fdocuments.in/reader035/viewer/2022062809/5697bf741a28abf838c7f9c3/html5/thumbnails/9.jpg)
Pepperpot Support & Main Flange
10/02/10 Simon Jolly, Imperial College 9
The linear shift mechanism (LSML) from UHVDesign mounted to the main flange.
Adjustable camera mount.
Cooled feed through rod.
KF-40 vacuum flanges used for feedthroughs
![Page 10: FETS Pepperpot Simon Jolly 10 th February 2010. The Pepperpot Beam segmented by intercepting screen with regular array of holes. Beamlets drift short.](https://reader035.fdocuments.in/reader035/viewer/2022062809/5697bf741a28abf838c7f9c3/html5/thumbnails/10.jpg)
Pepperpot Mounted to Vacuum Tank
10/02/10 Simon Jolly, Imperial College 10
KF-40 flange to be used for fibre optic feedthrough.