1. Tunnel Penetration Tunnel Floor Gun Little Oil Tank ISB Rack
Bue Oil Tank
HV Interlocks
PSS/MPS
Bus Bar
Gun Switches (x3)
HV Switch
Ross Probe (1000:1)
Bias Switch
Short
Resistor
Glassman (150kV)
Software
HV Enable
Knife Switch
Ross Probe DVM
Slow Lock (software)
Battery Bias (cathode)
QE scan
Gun HVPS Now
(150kV PS => 130 keV Beam)
Tunnel Penetration
Tunnel Floor
Gun
ISB Rack
HV Interlocks
PSS/MPS
Glassman (Control)
Software
HV Enable
Knife Switch
Battery Bias (anode)
QE scan
350kV
HVPS
SF6 Tank
Resistor
Gun HVPS Upgrade
(350kV PS => 200 keV Beam)

2. Gun HVPS High Level Plans
Can we retain and reasonable manage two HVPS for a transition period?
Commission new HVPS w/o “breaking” capability to operate gun during summer program (Bubble exp’t)
Test performance of new HVPS (w/o slow lock) against existing HVPS (w/ Ross probe and slow lock)
Retain capability to operate gun for Fall 2018 program (until 100% certain for cutover)
Fortuitously little overlap in HV hardware (oil vs. SF6 tanks, HV cables, uses different software app)
Advantage to test everyone’s new systems under TOSP?
Timeline & Resources
Earlier we can install during Summer 2018 SAD the more opportunities to commission and test w/ beam
At start of SAD (March-April) we plan to install (1-2 wks) and run (1-2 wks) Bubble exp’t
It would be excellent opportunity to install and test new HVPS w/ existing gun in May
But, if not ready … we will move forward to install new 200kV capable gun first (ready in May-June for HV)
Identify resources for systems :
High Voltage – HVPS + cables/connectors + SF6 tanks/recovery system
Safety – PSS/MPS Interlocks + beam operation
Controls – software + hardware interlock chassis + HV window comparator + QE scan from anode
Installation – mechanical support for assembly/craning
Procedures/training - operations support

3. (sufficient for 150 keV beam) Wien Filters Upgrade (x2)
Wien Filters NOW (x2)
(sufficient for 150 keV beam)
Wien Filters Upgrade (x2)
(needed for 200 keV beam)
ISB Rack
ISB Rack
EPICS Controls
HV Set = 1 DAC chan
HV Pol = 1 DIO chan
HV 0/1= 1 DIO chan
EPICS Controls
+HV Serial Comm
-HV Serial Comm
HV Pol = 1 DIO
HV Chassis (x2)
+HV Block PS
-HV Block PS
HV Switches
Tunnel Penetration
Tunnel Penetration
Matsusada
+30kV PS HV
Switches
Matsusada
-30kV PS
Tunnel Floor
Tunnel Floor

4. Wien HVPS High Level Plans
Timeline & Resources
Develop 3 complete Wien HV systems (1 for UITF and 2 for CEBAF)
High voltage power supplies have arrived (three +30kV and three -30kV)
John is ordering materials for the RS-232 communication
Next steps…
HVPS’s are ready for EPICS driver development
John is designing HV Switches (can someone work w/ John, then own the HV design, assembly, testing)
Then we can implement at UITF for testing
When successful CEBAF during SAD (by mid-summer?)
Commission and can operate for 130keV Fall 2017, ready for 200keV thereafter