====== Division of operational responsibilities ======
A detailed description of the level of support from the Device physicist and the Beam physicist can be found in the [[http://www.nscl.msu.edu/files/s800_sld.pdf|S800 service level description]] and [[http://www.nscl.msu.edu/files/A1900_sld_2007.pdf|A1900 service level description]] documents. Please visit also the [[https://groups.nscl.msu.edu/s800/s800frameset.htm|guidance]] policy document for experiments in the S3 vault.


====  Device Physicist ====
  * General tuning of S800 (XDT)
  * Determining biases
  * Operation of gas handling systems

==== User ====
  * Trigger changes
  * Installation of reaction targets in [[Stations|target area]] (pivot point)
  * [[Vacuum control#Target Chamber|Target chamber vacuum]] system operation
  * Tracking efficiency of [[Detectors#Plastic scintillators|OBJ scintillator]]
  * Installation of video camera in the Pivot-point area


==== User responsibilities that may need support from Device Physicist ====
  * [[Magnetic-rigidity setting|Determination of magnetic rigidity for spectrograph settings]]
  * [[During experiments#Particle Identification Corrections|Implementing PID corrections]]
  * [[During experiments#Mask calibration|Mask calibration]]
  * [[Vacuum control#Target chamber|Venting lower-dipole section (to install aligning telescope)]]

In the absence of a S800 device physicist, please follow the official procedure for handing over the beam from the operators/beam physicists to the experimenters and vice versa: [[https://intra.nscl.msu.edu/ccf/infoexperimenters/handingoverbeam.php]].

In case a S800 person needs to be contacted after-hours, please keep in mind that this has to be done by the Operator in Charge. In general, the operator routes requests from experimenters for after-hours laboratory resources to appropriate lab personnel (see 
[[https://intra.nscl.msu.edu/ccf/infoexperimenters/operators.php]] for more information).