LN2 Based Procedures from Kodi

CCR Warm Up Procedure

See day log K1-35087

• Power off the ion pumps

  • modify -s kpfgreen COL_PUMPON=No

  • modify -s kpfgreen ECH_PUMPON=No

• Set the lakeshore to ramping control with a rate:

  • Ensure ramping is on: show -s kpfgreen STA_CCDRMO COLDHEADRMO should both be “On”

  • modify -s kpfgreen COLDHEADRMP=1.5

  • modify -s kpfgreen STA_CCDRMP=1

  • The ramp units are degrees per minute

• Change the target temperature

  • modify -s kpfgreen COLDHEADTRG=40 STA_CCDTRG=40

CCR Cool Down Procedure

• Set the ramp rates:

  • modify -s kpfgreen COLDHEADRMO=on COLDHEADRMP=1.5

  • modify -s kpfgreen STA_CCDRMO=on STA_CCDRMP=1

• Start the cold head cooling:

  • modify -s kpfgreen COLDHEADTRG=-110

• Wait a few minutes to let the CH start cooling, then:

  • modify -s kpfgreen STA_CCDTRG=-100

• Once everything is down to temp or levels off because of the higher partial pressure in the cryostat then give it another 2 hours and turn on the ion pump:

  • modify -s kpfgreen COL_PUMPON=Yes