Ion Pump Power Supplies - February 20, 2019

Let's meet on Wednesday from 3-4pm in TL-1227 to discuss possible CEBAF injector vacuum upgrades.

Overview

Injector Upgrade - Gun through Quarter, maybe through FC2 gate is being rebuilt

Timeline/Opportunities - SAD (Aug-Oct, 2019), Upgrade (May 6, 2020 ... for 6 months)

Review Marcy/Daniel survey of injector IP power supplies media:190220_IP_Summary.xlsx

Existing Power Supplies

John's serial UHV work => unique design (low power 100uA, have interlock option, digital comm for readback, HV set, interlock limit?)

Digitel supplies work => aging, poor resolution (high power mA, many ganged pumps, analog ADC readback, interlock limit boxes?)

IP PS Upgrade Considerations

Ion pumps

Provide holding voltage with nA or uA curren

Provide starting current of X uA?

Independence (Adjust HV set on any IP, monitor current on any IP, interlock any IP)

Still require some high power supplies available for bakes, activation, readback helpful, interlock probably not necessary

Power supplies

Gamma SPC => experience in rest of machine, nA resolution, EPICSs

INC UHV => INC own/evolve design?, used at UITF, sub-nA resolution

John's presentation info

Why we did it media:why.pptx

How we did it media:how.pdf