MC for GBP. Priority list
LUXE
- Dose for the electronics placed nearby the gamma beam horizontal plane
- (4/5) Kyle will prepare a neutrons map of irradiation of the area where the mini-crate is going to be placed.
- Hadronic interactions on the profile reconstruction
- Results: energy deposited is 30% higher. Main conclusions of the TN still valid.
- Best distance between the I and II station (min/max distance d_1, d_2)
- Check that 10um W foil in gamma spectrometer is included in lxsim [yes]
- Check that 200um Kapton - Al window at the beam pipe exit window in accounted [yes]
- Thermal stress on the detectors and on the beam pipe exit window (200um Kapton/Al)
- Not a problem for the Kapton (link101) (link102). Therefore, thermal stresses on the sapphire detectors is expected to be neglibible.
- However, temperature variations over time are important since they affect local charge carriers mobility in sapphire. A temperature map for a representative set of \xi values (i.e. \xi=3, 10) is necessary to evaluate this effect.
Sapphire pads test at BTF of the LNF (Frascati May 9-11 2022)
- Geometry of the setup (link201)
- Two aligned sapphire wafers of thickness 110um and 150um respectively.
- Each wafer has 2 large pads (diameter d=5.50mm) and 2 smaller ones (d=1.60mm).
- The two wafers are mounted on identical PCBs, which are contained in a 3mm-thick zamak box of size 19x19x7mm. This assembly will be referred as device under test (DUT for short).
- The circuits are aligned, in other words for example if the beam center targets the large pad of the 110um then also the 150um's large pad will be intercepted by the electrons beam.
- In the beamline there are few other materials:
- 30cm upstream the device, a 50um-thick Ti layer
- 10cm upstream the device, a 300+400um Si layer
- Characteristics of the test beam (link202) (link203)
- Estimating the expected signal with Geant4+Allpix2 (link204)
- Dose received for each beam configuration (intensity, spatial distribution)
Allpix2 validation with DESY-II data
Presented in the mini-workshop on sapphire (link301)
Padova experiments with the alpha source and sapphire 110/150 um
Presented in the mini-workshop on sapphire (link301)
- Energy loss in air/metallization/sapphire, spatial distribution of energy depositions in DUT
- Model the charge propagation in sapphire using CCE data and Allpix2
