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Meeting ID: 666 4572 2791
Passcode: 538952
A new concept for the readout electronics of the GBP has been presented and discussed
In this scheme, the readout electronics will be based on the commercial modular system CAEN FERS 5200, which is composed by readout cards (64 input channels each) and a single "concentrator" module which will acquire the data from them.
The 3+3 readout cards (one X-Y station) will be plugged in the patch panel (PP) which will receive and distribute the signals from the detector.
The position of this PP has to be discussed with LUXE TC, but it seems very likely that it will be mounted on the platform where the GBP detector will be placed.
In this way, the GBP readout electronics will be very compact and placed very near to the detector.
The design of the PP has to be agreed with the INFN-PD group, since it could interfere with the mechanics design
The first design of the detector mechanics has been presented. The positioning of the two X-Y detectors has been discussed. The 90 degree rotation of one support PCB wrt to the other could create some difficulty in the detector cabling and dismounting. Sergej pointed out that the position of the two detectors wrt the beam must be identical: for both modules the HV plane must be upstream and the strips downstream. This in order to optimize the electrons collection efficieny. The point it has been taken. We will think about solutions of having, for instance, different X-Y PCB design, a common design which could accomodate contemporarily the two options, or the two detectors could be placed at some distance which allows easy maintenance operations. For this, Kyle was asked to provide MC simulation results which could show the impact on the beam profile reconstruction by placing the X-Y planes at 0.5, 1,2,3, 5 cm distance.
The Faraday cage design was also discussed. here the identified critical points are two:
1) The entrance and exit window. The present ideas are 2x2 cm2 5um kapton windows, but the effect of a solution with a metallized window should be investigated with MC simulation
2) Kapton flat cable routing to the PP. Sergej suggested that the Faraday cage should have 4 slits at its base in order that the flat cables can be routed to the PP. In this way, the Faraday cage could be easily removed for maintenance operations. The Faraday cage should also have a dry air circulation system to continuosly flow the detector at a rate of about 1l/min.
The options for the test beams were finally discussed after the inputs given by Mauro and Sergej.
An overall strategy should be prepared by me and discussed at the next meeting in order that the test beam facilities experts (ELBE and Frascati) can be contacted to book test beam periods.
The date for the next meeting will be circulated next week. At the moment the idea is to have it on July 15th