proton improvement plan keith gollwitzer may 6th, 2013 all experimenters’ meeting
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Proton Improvement Plan Keith Gollwitzer May 6th, 2013 All Experimenters’ Meeting. Thanks to F. Garcia for Linac slides . Overview of Status . RFQ Largely in operations mode – But… Still adjusting n ew s ources – spark rates and emittances have improved - PowerPoint PPT PresentationTRANSCRIPT
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Proton Improvement Plan
Keith Gollwitzer
May 6th, 2013All Experimenters’ Meeting
Thanks to F. Garcia for Linac slides
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Gollwitzer AEM 2
Overview of Status • RFQ Largely in operations mode – But…
– Still adjusting new sources – spark rates and emittances have improved
• Second Source – with new hardware design has been tested• Linac Commissioning continues while improving
– Efficiency Improving: Up to 90% (current still lower than desired)
• Linac Beam Position Monitor system upgrade complete• Progress on developing Linac modulator for replacement/upgrade; both
in-house (AD/EE support) and by SLAC• Booster commissioning continues with many studies• Booster RF Solid State Upgrade completed• RF cavity refurbishment goes on• Progress in utilities replacement/upgrade
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Linac Utilities
• Power Distribution– L1 transformer
• Continue with the prep work for the installation of L1 transformer. – Approval from FESS to
proceed - DP-18 complete
– Electrical conduit relocated to clear the area
– Quote on hand for hatch manufactured and installation
Linac L1 transformer – storage
Hatch location
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• BPM Electronics Upgrade complete
Linac Instrumentation
Diagnostics Room Update existing RF Logamp electronics with
Digital electronics FPGA, ADC, Digital Signal Processing Long term stability Flexibility to modify system as needed
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Linac - 200 MHz Rf Power System -1• Modulator Upgrade– 35kV, Marx-topology modulator to drive triode (or MBK)
– SLAC – Two cell test stand
Two vernier cells: ripple +/- 37VSpec:+/- 25V (F1-Marx design uses 10 main cells)
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• Modulator Upgrade (cont.)– 35kV, Marx-topology modulator
to drive triode (or MBK)– AD/EE – One cell test stand– Test: Short circuit
» The Soft Shut Down circuit is used to softly shut down the IGBT if a fault occur
Contribution by: H. Pfeffer
Short circuit current1000A/
Load voltage & shortcollector 200V/
Load current 100A/
Linac - 200 MHz Rf Power System - 2
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Gollwitzer AEM 7
Booster Aperture Scan
Booster Notch Beam Absorber
Last power supply/kicker system for beam notching system has been commissioned
Many Booster studiesAperture scansLattice Radiation studies
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Gollwitzer AEM 8
Solid State RF Station in Gallery
New Power Amplifier
Booster Solid State Upgrade is complete!
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Booster RF Work• Solid State Upgrade is complete
– Major benefits to reliability and the cost of operation• Refurbishment continues
– Un-certified a cavity due to RF leak
Booster Cavity WorkRefurbished (15Hz)
SS Prototype SS Upgraded
Cavity Removed
Gollwitzer AEM
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We are now concerned about connection with outer flange
Gollwitzer AEM
Pulled one cavity and have started testing
RF leak from outer flange?
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Gollwitzer AEM 11
Cavity RefurbishmentThere is always something unexpected: goop epoxy fix from some prior leak
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Gollwitzer AEM 12
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Gollwitzer AEM 13
Near Term Plans• RFQ injector – Will be adding a new trim package (improve transmission)
• Installing Booster Utility Transformer• Installing Linac Roof access • Booster aperture studies• Booster Cogging studies• Booster Lattice Studies• Booster Cavity Refurbishment
• Operations:– Higher Intensity Tune-up– Address shielding assessment issues to allow for higher flux