Cryotarget Training Common Target Training for Halls A & C for the 12 GeV Era A trained TO must be on shift whenever the target is liquified Tgt Ops as they have been for >20 years

12 GeV Target Training Requirements For all new TO’s: Oral Training course Practical: training in CR with an expert & a cold target ~ half shift shadowing a trained TO For already-trained (in 6 GeV era): Training course recommend to attend oral training class must at least read training slides online short training review in CR with expert Training in Hall A is good for Hall C & vice versa

Training Ingredients List of what the TO must know how to do, & what’s done by the tgt group/experts Who are the experts & how to reach them Basic target anatomy & goal parameters How to run the tgt GUIs & Alarm Handler: reboot tgt IOC, query archiver, interpret strip charts, change targets, adjust coolant, recognize developing problems, etc. How to handle off-normal events

Some Resources Users Guide to the Hall C Cryotarget:  https://userweb.jlab.org/~ckeith/Ctarg/CtargManual.html Hall C cryotarget web page:  https://userweb.jlab.org/~smithg/target/Qweak/#_12_GeV_Era Hall A/C Target Training Talk:  https://userweb.jlab.org/~smithg/target/Qweak/HallACTgt_Training.pdf Hall C Operational Restrictions:  http://opweb.acc.jlab.org/internal/ops/ops_webpage/restrictions/ops_restrictions.html Hall C Target Archiver:  https://hallcweb.jlab.org/targetlog/ Tgt expert on call 24/7 when condensed https://hallaweb.jlab.org/halog/screen_snapshots/target/

Main Target Control GUI IOC Heartbeat Alarm Handler ESR Secondary GUI buttons Strip Charts Parameter colors keyed to ALH (green, yellow, red, white)

Strip Charts

Alarm Handler (Audible & Visual) CTARG

Operational Restrictions Limits set ahead of time by a designated expert. TO’s must check this before putting beam on a new target. MCC is also supposed to check IBEAM & Raster for new targets. Target ion chamber calibrated for each target.

CR Hardware Dedicated tgt computer & monitors Raster scope, beam current display Kill switches tgt motion, heater, JT valves Sirens Low H2/D2 pressure, SC vacuum Analog H2 temperature readout lifeline during IOC reboot, network outage Analog auxiliary heater control can manually stabilize tgt in off-normal situations

Live Target Status on your phone! Very useful, especially for Tgt Experts. Can diagnose problems quickly, from anywhere, when called.

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Experts Name Work Pager Cell Home J.P. Chen 7413 218-0722 867-7380 Silviu Covrig 6410 (843) 697-1753 Greg Smith 5405 871-4371 565-9883 Dave Meekins 5434 327-5491 968-9076 874-4750 Chris Keith 5878 327-5527 596-3002 If you need help, call on-call person 1st (posted in CR), then these people in the order listed. (use home # only as a last resort if off hours)

High Loop Temperature Alarm No real danger. Just delays. Ask MCC to turn off the beam Check other TS’s, & analog temp. r.o. If just PID TS  change PID TS LH2 Pump tripped? Restart. HPH should be @ 0W. If not turn it off. SC vacuum OK? Turbopump tripped? Call tech-on-call (Hall A or Hall C) Coolant Tsupply abnormally high? Close offending JT. Reduce pump speed. May be ESR/CHL or xfer line IV failing… SAMPLE Training Talk Slide