Summer ‘09 SAD
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Transcript of Summer ‘09 SAD
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Summer ‘09 SADInstall “Inverted” HV
chamber with capabilities for higher voltage, anticipating
better transmission & photocathode lifetime
Same good photocathode PREP and LOAD chambers
Spin Flipper: Stage 1
• Remove unbaked girder region between valve & chopper• Install new “normal” Wien for Physics program, with quad correction• Thoroughly test & transfer functionality for setting pol.• No need to move laser room.
Preserve baked region, continue
R&D/BS during Fall
H-Wien + Quads
Harp/MFA0I03 “match point”
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Gun Status
e-
Present Ceramic• Exposed to field emission• Large area• Expensive (~$50k)
Medical x-ray technology
New design
New Ceramic• Compact• ~$5k
Want to move away from “conventional” insulator used on all GaAs photoguns today – expensive, months to build, prone to damage from field emission.
neg modules
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Mechanical Layout
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Optical Layout (Wien=0)
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Optical Layout (Wien=90, Quads=OFF)
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Optical Layout (Wien=90, Quads=ON)
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Optical Layout (Wien=90, Quads=ON)Max. B’L ~23 G
Will use QS (B’L ~ 13G/Amp)
200keV increase is 50% (OK)