UPDATES ON THE WORK DONE ON THE MINI-TIME PROJECTION CHAMBER Mayra - - PowerPoint PPT Presentation
UPDATES ON THE WORK DONE ON THE MINI-TIME PROJECTION CHAMBER Mayra Lopez-Thibodeaux 05-23-13 Trigger 2 Inside TPC Vessel Trigger = A signal blob of electrons over threshold makes it to the FEI4 This tells the FEI4 system to read out
05-23-13
A signal blob of electrons over
This tells the FEI4 system to read
Inside TPC Vessel
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The trigger is control for every run by several functions in STControl at the Basic Par’s tab under the PixScan Panel “Trigger type” and “Type of event” count are important
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The FEI4 internal trigger was set up externally by connecting it from the chip board to the USBpix board’s ground and HitOr pins Also, an external trigger was set up to be done by the scope connected to the x-ray signal
With no trigger event count, data from more than one x-ray event might be
gathered
The internal self trigger source scan under trigger type does not seem to
follow the number of event count given, but keeps triggering until it is stopped
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Internal self trigger source scan occupancy plot under data record event count (1 event at high rate) Internal self trigger source scan occupancy plot under trigger event count
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What 5 events should look like
The HitOr from another FEI4 tested for five events under gave a signal output on the scope similar to this picture
The test vessel was opened to test
Its signal output was consistent with
the tests done previously
We concluded this function of our
FEI4 is broken The FEI4 being tested directly
HitOr trigger being tested for 5 events
HitOr trigger signal on the scope
The avalanche detector consisting of
two GEMs in series above the pixel chip with thin insulating spacers in between GEMs and between the pixel chip and the bottom GEM will have to be taken apart
Another FEI4 will be mounted and
wired bonded on our pixel chip board
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The Double GEM and FEI4 package at the bottom of the field cage
Side view illustration of the detector package
Data acquisition using the TESTBEAM external trigger
This scan does write the raw data
Most probably, the internal trigger will be set up
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