Electron Gun UP (EGUP) Plan CEBAF Fall Run 10 week run in FY18 : September 28 – December 21 Four halls scheduled to receive beam – will be a challenge Gun2 is running splendidly Allocate one week to finalize laser setup: 4 laser @ 250MHz, co-aligned, A/C lenses to 5-axis mount?, chiller? Installing the EGUP ”200kV” gun operating w/o FE @ 130kV, but signs of FE emission onset near 200kV Base pressure of gun likely not yet realized Proposed Plan for the Fall – Commission both guns at UITF, choose best candidate for CEBAF “200kV” gun Re-bake gun w/ with typical NEG activation process HV condition ”200kV” gun to higher voltage (Spellman 225-250kV, Glassman > 225kV w/ R30-R28 SF6 tank) “350kV” gun HV condition gun Bake prep Complete laser/beam line to first pcup Commission w/ beam Complete NEG BPM line Define a plan for CEBAF EGUP HVPS to support 200kV gun + future headroom, e.g. Glassman PS (>300kV)

Week of… Summer SAD Calendar What could we do? Jul 10 200 kV / Inj controls upgrade Gun2 (DBR/high-P) Spin resonator bench test Jul 17 Gun2 (DBR/)high-P Spin resonator install Jul 24 200 kV DBR : high current Jul 31 200 kV / 2K SRF? DBR : high current/Mott Aug 7 Bubble / 2K SRF High-P : QE/Mott Spin resonator test Aug 14 Aug 21 PSS Cert / 2K SRF PQB Laser (RTP) Aug 28 Sep 4 Cryo Reconfig Finalize laser for Fall program Sep 11 Inj setup / 4K operations Sep 18 Inj setup / 2K operations Sep 25 CEBAF setup begins