Detector Chambers and Mobile Racks

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)

Taking a look at the EPICS PV descriptions of the detector chamber motors, we can get an idea of what's 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)

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