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CXI has two in-vacuum 2.3M CSPAD pixel-array detectors.  Each detector can be stationed downstream of one of CXI's three interaction points and can be read-out individually, together, or independently – allowing CXI the capability to operate two experiments simultaneously using a single X-Ray beam.  When running two experiments during the same shift, the upstream experiment uses the DS1 CSPAD in the primary DAQ, while the downstream parasitic experiment will use the DS2 CSPAD in the secondary DAQ.  The names DS1 and DS2, refer to the vacuum chambers that contain the CSPADs as well as a handful of motorized beamline components such as pulse pickers, beamstops, and alignment stages.  

 

(Pic of detector chambers)

(Pic of CSPAD inside det chamber creepin around the corner all sneaky like)

 

Taking a look at the EPICS PV descriptions of the detector chamber motors, we can get an idea of what else is inside them.

Obtaining the descriptions of the DS1 motors using caget,

cxi-control:~> echo -e "Motor PV\t\t\tDescription:"; caget CXI:DS1:MMS:{01..14}.DESC
Motor PV                       Description:
CXI:DS1:MMS:01.DESC            vee_slide (m5) X US North
CXI:DS1:MMS:02.DESC            vee_lift (m4) Y US North
CXI:DS1:MMS:03.DESC            flat_lift (m3) Y US South
CXI:DS1:MMS:04.DESC            cone_slide (m2) X DS
CXI:DS1:MMS:05.DESC            cone_lift (m1) Y DS
CXI:DS1:MMS:06.DESC            In-Vacuum LS-180
CXI:DS1:MMS:07.DESC            Be lenses X
CXI:DS1:MMS:08.DESC            Be Lenses Y (not locked out)
CXI:DS1:MMS:09.DESC            ATT X
CXI:DS1:MMS:10.DESC            ATT Y
CXI:DS1:MMS:11.DESC            ATT Z
CXI:DS1:MMS:12.DESC            PP X Stepper Motor
CXI:DS1:MMS:13.DESC            PP Y Stepper Motor
CXI:DS1:MMS:14.DESC            Pulse Picker Motor

and of DS2,

cxi-control:~> echo -e "Motor PV\t\t\tDescription:"; caget CXI:DS2:MMS:{01..07}.DESC
Motor PV                       Description:
CXI:DS2:MMS:01.DESC            X US North Lift
CXI:DS2:MMS:02.DESC            Y US North Lift
CXI:DS2:MMS:03.DESC            Y US South Lift
CXI:DS2:MMS:04.DESC            X DS Lift
CXI:DS2:MMS:05.DESC            Y DS Lift
CXI:DS2:MMS:06.DESC            In-Vacuum LS-180
CXI:DS2:MMS:07.DESC            Beamstop Y

 

Both DS1 and DS2 have companion mobile equipment racks – D50 and D51 respectively.  The racks are nearly identical and each contain power supplies and readout electronics for detectors, a Digi, a 4-channel stepper motor controller, an EPICS IOC server, and (whatever else).  A chamber's mobile rack will handle controls and feedback for detector power and diagnostics monitoring, stepper motor control, and serve as an interface for detector data and timing input/output.

 

 

(picture of a mobile rack and probably should make rack profiles)

 

 

 

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