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shutdown_s800_s3_vault [2020/11/06 14:45]
pereira
shutdown_s800_s3_vault [2020/11/06 14:46]
pereira
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 The following checklist describes the steps to follow during an emergency shutdown. The assumed scenario is that where the entire S800 (and S3 vault) must be turned off on short notice due to unanticipated reasons. Please, be aware that the procedures described below involve many different systems in the lab. As such, it is highly recommended to coordinate with operations staff using all available communication channels (face-to-face,​ hourlog, 8am-meeting and short-meeting). ​ The following checklist describes the steps to follow during an emergency shutdown. The assumed scenario is that where the entire S800 (and S3 vault) must be turned off on short notice due to unanticipated reasons. Please, be aware that the procedures described below involve many different systems in the lab. As such, it is highly recommended to coordinate with operations staff using all available communication channels (face-to-face,​ hourlog, 8am-meeting and short-meeting). ​
  
-=== Communication before and after completion of Shutdown ===+==== Communication before and after completion of Shutdown ​====
   * Give heads up to Operations (control room).   * Give heads up to Operations (control room).
   * If possible, give heads up (via email) to Cryogenics, Magnet group, Vaccum group, and experimenters.   * If possible, give heads up (via email) to Cryogenics, Magnet group, Vaccum group, and experimenters.
   * Before and after completion of work, make an entry in Hourlog indicating status of S800. Include also contact information.   * Before and after completion of work, make an entry in Hourlog indicating status of S800. Include also contact information.
  
-=== Detectors ===+==== Detectors ​====
   * Turn off all GUI-controlled HV (including iSeg HV for hodoscope (crystal #20), located in S3 crate attached to FP chamber).   * Turn off all GUI-controlled HV (including iSeg HV for hodoscope (crystal #20), located in S3 crate attached to FP chamber).
   * Turn off power supply preamps and CRDC interface boards (same S3 crate attached to FP chamber).   * Turn off power supply preamps and CRDC interface boards (same S3 crate attached to FP chamber).
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   * Turn off CRDCs chiller.   * Turn off CRDCs chiller.
  
-=== Vacuum === +==== Vacuum ​==== 
   * Close ALL gate valves.   * Close ALL gate valves.
   * Vent focal-plane chamber with dry N2. In order to prevent air from leaking into the chamber (avoid humidity), make sure that dry-N2 pressure inside the chamber is slightly above 760 Torr. VERY IMPORTANT: during the shutdown, it is important to make sure that the chamber is always filled with dry-N2.   * Vent focal-plane chamber with dry N2. In order to prevent air from leaking into the chamber (avoid humidity), make sure that dry-N2 pressure inside the chamber is slightly above 760 Torr. VERY IMPORTANT: during the shutdown, it is important to make sure that the chamber is always filled with dry-N2.
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   * Turn off all mechanical pumps. Close rough and foreline valves.   * Turn off all mechanical pumps. Close rough and foreline valves.
  
-=== Magnets ===+==== Magnets ​====
   * Set all Brhos to 0 Tm.   * Set all Brhos to 0 Tm.
   * Turn off all power supplies, including steerers.   * Turn off all power supplies, including steerers.
  
-=== Cryogenics ===+==== Cryogenics ​====
   * Notify (e.g. email) Cryogenics that all magnets are off.   * Notify (e.g. email) Cryogenics that all magnets are off.
   * Check if there is any He lead return pipe open. If so, notify Magnet group and/or Cryogenics group so they can close it at their earliest convenience.   * Check if there is any He lead return pipe open. If so, notify Magnet group and/or Cryogenics group so they can close it at their earliest convenience.
  
-=== S3 Vault ===+==== S3 Vault ====
   * Turn on FAN   * Turn on FAN
   * Leave all lights in the vault ON   * Leave all lights in the vault ON
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          * Remco Zegers (Magnetic Spectrometer group leader)          * Remco Zegers (Magnetic Spectrometer group leader)
  
-=== Electronics and computers ===+==== Electronics and computers ​====
   * Turn off all crates in S800 rack (S3 vault).   * Turn off all crates in S800 rack (S3 vault).
   * Turn off all crates in dU6.   * Turn off all crates in dU6.
shutdown_s800_s3_vault.txt ยท Last modified: 2020/11/06 14:46 by pereira