January 13, 2020 - Service providers

Service providers discussion

Scope of 2020 SAD

• Booster will remain at UITF in 2020 to commission HDIce, nominally moves to CEBAF in 2021 during summer SAD.
• During the 2020 SAD we will...

-Make the gun operate at 200 kV (A: make present gun operate 200 kV, B: install new electrode)

-Reconfigure beam line extending from gun up to chopper (stretch goal is replace chopping chamber itself)

-Commission the gun + beam line with 200 keV beam

Beyond 2020 SAD

• We will not modify the configuration downstream of chopper until new Booster goes in

-This means the capture and QCM remain until Booster installed

-This also means we'll operate the gun and beam line at 130 keV until that time too

Status of the 2020 beam line upgrade

• Layout

-We have a preliminary ME layout, w/ sequence and approximate tally of elements

-CIS/INJ/CASA are simulating and evaluating layout for functionality and performance now

-Goal is to finalize ME layout and the before v. after by late Feb, give or take

• Vacuum

-Valves, same number, maybe one less

-IPs, Marcy has as-is tally, should be OK, may need to order couple small pumps

-DP stations, new NEG's for Y- and DP chamber, otherwise the same

• Magnets

-Solenoids (beamline+chopper), updated bids due Wed 1/15, anticipate quick turnaround

-Wien filters, PO written, coils due early march

-Still need two 20A PS installed

-Still need WIen filter HV PS, switches, cables installed

-15 deg dipole, bids received, anticipate PO within a ~week (more S&A work than usual)

-1 trims now w/ comparator, need the same

-Haimons-style steering coils, should have enough in hand, will order spares once layout done

-Wien correction quads, TBD depends on layout/modeling, may re-use peanut quads initially

-6 trims now, probably need less

• Diagnostics

-Harp, have two now, aiming for one later

-Viewers, repair cracked YAG; tally is similar to what we have now, final TBD

-Brock cavity, goes away

-Current monitors, keep A1/A2/PCUP

-BPM's, TBD, but similar number

-Magic beam locating device, none

• RF

-prebuncher, probably the same, but need more power >30W?...TBD

-choppers, leave as-is and decided to retain the captured solenoids (so no vacuum work or removal)

• Chopping chamber

Designing entirely new 1:1 replacement, not sure it will be ready this SAD, but that's the goal, stay tuned

Timeline

• HV Condition Gun2 (1 week)

(X shifts) Tee to 200 kV

• Gun/NEG tube vacuum work (2-3 weeks)

(10 day) Small shed bake

(X day) HV condition small shed @ 200 kV

(3 day) Replace NEG tube + anode flange

• Rebuild beam line (7-8 weeks)

(2 days) Make everything safe

(3 days) Disconnects of cables and controls and dumping of penetrations

(2 days) Girder vacuum disconnects and removal to labs and tunnel storing

(2-3 weeks) Wien breakdown + shop work + re-assembly + HV testing + mapping)

(2-3 weeks) Populating new girder layouts with existing hardware + alignments

(3 days) Pedestal modifications

(1 week) Installation, 1A, vacuum hookups, 2A

(2 weeks) Bakeouts

(1 week) Cable reconnects and HCO

• Beam Commissioning Jobs (2-3 weeks)

(9 shift) HCO w/ beam first time

(2 shift) Injector steering script for new location of correctors and bpm’s

(4 shift) Wien filter spin calibration w/ Mott (at 130 keV)

(4 shift) Wien optics measurements and quadrupole correction

(2 shift) Dipole optics measurement to finalize shims

(2 shift) Develping a matching criteria

(1 shift) PSS kicker @ 130 keV and 200 keV

(9 shift) Gun lifetime checkout