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(if you are using the ar-esaux3 console in the ESA control room locally, it's likely that it was already logged in as tfuser with this setup already done)
(this last command should bring up the ESTB EPICS panel on the right) For ATLAS test beam operations with Caladium, the dedicated T-539 panel contains some of the most relevant sub panels. |  |
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Beam Trigger
The "Triggers" panel on the ESTB EPICS GUI brings up the Experimental Triggers panel where channel 10 (Si Tracker Caladium) controls the beam trigger. The trigger NIM signal is carried to Caladium with a green BNC cable to a LEMO connection into the TLU Chan 0 PM in trigger port. The Delay value is the critical control of timing that DUT is very sensitive to and vary significantly between different types of DUTs, while EUDET seems to work with a wide range of delays automatically. The Trigger width parameters didn't appear to have much effect on anything.
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The beam dump monitors, Lead Glass (LGdump) dump, and Front/Read dumps are a key monitoring tool to give direct look at the beam intensity. ESTB GUI "Scope ESA" panels is particulary useful as a standard monitor for instantaneous beam status as scope pulses. "ADC Chanls"/"Histograms" panel displays the instantaneous values and distributions of energy measurements of various dumps. "HV SY403" can be used to adjust HV values for different intensity measurements. "Histograms" panel displays the instantaneous values and distributions of energy measurements of various dumps. "HV SY403" can be used to adjust HV values for different intensity measurements.
Time History Chart
The "StripTool" panel is a very handy general utility that allows you to keep track of the time history of any variables in EPICS. For example the DUT region temperature sensors are particularly useful in cooled sensor operations From the StripTool Control panel, you can pick from any EPICS display panel an variable by clicking the middle button of the mouse over the displayed value of that variable which will bring up a signal name string which can be dragged into the StripTool "Plot New Signal" selection field to add the signal to the time history strip chart.
The T-539 panel
| The T-539 panel contains most of the relevant displays for Caladium telescope and ATLAS DUT. |  |
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Caladium BeckhoffXY stage motors: The telescope + DUT assembly are mounted on a remote controllable base "coarse" XY control (X=horizontal transverse to beam; Y=vertical) to align the whole assembly wrt beam. During new test beam periods, this is typically done initially using a pair of alignment lasers in conjunction with fiducial markers to center to expected beamline within a few mm. The vertical position is gauged by a laser mounted on the tunnel side wall. The horizontal position is gauged by another laser hanging the ceiling near the side entrance. Once positioned close enough, the refined alignment is done with the beam data in telescope. For both laser alignment and beam alignment, the position adjustments for the whole telescope (including DUT mounted within it) is done with the dedicated Caladium XY stage Beckhoff26 subpanel shown on the right. The base XY stage for the whole telescope + DUT is controlled by the "coarse" X,Y adjustments. +X is pointing away from the ESA entrance gate; +Y is pointing up. The Spring/2016 upgrade added a "fine" XY stage for the DUT to allow additional adjustments of the DUT with respect to the telescope. There is an additional optional DUT rotational stage control. Temperature The Caladium upgrade also added some temperature sensors that can be plugged into desired parts of the DUT setup. The displays for them are on the "KL3314 temp" tab of the Beckhoff panel. |  |
Remote Power Strip ControlThe new T-539 panel has a sub panel contains the individual socket controls for the dedicated power strip on the Caladium+DUT electronics/DAQ rack. Clicking on individual channel channel's "Reboot" button will recycle power on that channel. Some channels may automatically flip the state to green after a brief moment, others may need deliberate push on the state button to reenable. The assignments of the channels for the May/2016 T-538 run is shown on the right as an example. Using the terminal in the ESA counting house logged in as tfuser anyone update the channel titles themselvles. |  |
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Useful links
SLAC FACET/ESTB portal | ESTB portal (including beam schedule) | ESTB new user registration |
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