Difference between revisions of "RCDB Conditions Help"

Latest revision as of 15:20, 29 February 2016

This page gives definitions of the condition variables stored in the RCDB as of RunPeriod-2016-02.

Condition Name	EPICS variable	Notes
beam_current	IBCAD00CRCUR6	Beam current from electron dump (?) BCM, averaged over run, in nA
beam_energy	HALLD:p	Measured electron beam energy, in GeV
coherent_peak	HD:CBREM:REQ_EDGE	Requested high-energy edge of the coherent peak, in GeV
collimator_diameter	hd:collimator_at_[block,a,b]	5 mm, 3.4 mm, blocking
luminosity	N/A	For future use
ps_converter	hd:converter_at_[home,a,b,c]	5 x 10^-3 RL, 1 x 10^-3 RL, 3 x 10^-4 RL, Retracted
solenoid_current	HallD-PXI:Data:I_Shunt	Measured current in solenoid magnet, in A
status	N/A	For future use
radiator_index	HD:GONI:RADIATOR_INDEX	Goniometer radiator position index, as described in this page.
radiator_id	HD:GONI:RADIATOR_ID	Goniometer radiator unique ID, as described in this page.
polarization_direction	HD:CBREM:PLANE	Direction of the photon beam linear polarization with respect to the floor: PARA, PERP, or UNKNOWN
radiator_type	HD:GONI:RADIATOR_NAME OR hd:radiator_at_[a,b,c]	Goniometer radiator name, as described in this page, Amorphous radiator (2 x 10^-5 RL, 1 x 10^-4 RL, 3 x 10^-4 RL), or retracted
target_type	HLD:TGT:status	Status of LH2 target: OFF, Cooling, Filling, FULL & Ready, Emptying, EMPTY & Ready
polarimeter_converter	hd:polarimeter_at_*	Polarimeter's converter. Values: RETRACTED/Be 50um/Be 75um/Be 750um

Other Notes

When the nA BPMs are calibrated, we could use another variable for the beam current that might be more accurate for lower (<1 uA) currents, e.g. IPM5C11.VAL,IPM5C11A.VAL,IPM5C11B.VAL,IPM5C11C.VAL

@@ Line 29: / Line 29: @@
 |-
 | target_type || HLD:TGT:status || Status of LH2 target: OFF, Cooling, Filling, FULL & Ready, Emptying, EMPTY & Ready
+|-
+| polarimeter_converter || hd:polarimeter_at_* || Polarimeter's converter. Values: RETRACTED/Be 50um/Be 75um/Be 750um
 |}