I developed a 16 channel readout board for LGADs, with the help of the electronics workshop from UZH. This board opens the possibility to measure 4×4 pixelated structures. It is, in essence, a replication of the Chubut 2 board, which has 4 channels, so the performance is very similar. More information about this board can …
After a lot of work I finally have the first version of the Chubut 2 readout board for LGADs ready. More info in this link.
Recently I came across the problem of having to precisely measure the charge produced by a PIN detector from the RD50 FBK TI-LGAD production. As we know, PINs have no internal gain and since this one is from the TI-LGAD production it is only 45 micrometers thick. Thus, the signals are really small and the …
Charge measurement on radiation silicon detectors with poor SNR Read More »
For a project I will hopefully present and describe in a future post, we need to measure a “large” number of channels with similar characteristics as we currently do with out LeCroy oscilloscopes (see some previous posts). “Large” here means on the order of 8-16 channels, which becomes a bit too much for doing with …
Testing a CAEN digitizer for timing measurements Read More »
So far, for all sensor studies, I have been using either a single channel active board (Santa Cruz or Chubut) or a multi channel passive readout board. Though this works, it is not ideal. Firstly, the passive readout board is not the best because usually the amplifier is installed as close as possible to the …
A week ago I posted about the Robocold setup in this post. Now I have coded further in the control software for it and it is capable of performing automated beta scans on all the detectors. Using this, I have done a beta scan on each of the (working) detectors that are installed at the …
Further preliminary tests with the Robocold setup Read More »
In this post I will present the Robocold beta setup a.k.a. the LGAD long term test setup, LGAD stability test setup, etc. The first presentation of this setup I made it about one year ago in this link. After that, other projects appeared, also the climate chamber was failing, so I ended up delaying the …
In the later months we have engaged in the market survey for the sensors of the CMS MTD. A long time has passed since my previous post focused on the beta setup and I have learned a lot. However, I was still not able to reach the final expected time resolution for the detectors. After …
Since we acquired our Photonis PMT I have been experimenting with it, and I noticed that the signals become noticeably smaller if I require the oscilloscope to trigger in coincidence between the LGAD and the PMT than if I trigger only on the LGAD. So I made a beta scan to see how important is …
This is the continuation of my previous post where I showed the main results on the inter-pixel distance measurement in TI-LGADs. In this post I will summarize my results for the same devices but after they have been irradiated. This was presented in the VCI2022 conference, here you can find the slides which I also …
