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 »
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 …
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 …
Recently we received our new MCP-PMT of which I presented a first test in this post. Today I am posting the first serious characterization of the device. All the details can be found in this document which I embed below: As a summary, I measured a time resolution of about 22-24 ps for the MCP-PMT …
Characterization of the new MCP-PMT as a timing detector for beta particles Read More »
Today I successfully detected beta particles using an MCP-PMT which we plan to use as a timing reference. Since an MCP-PMT is, as its name suggests, a device intended to detect photons and not electrons, I want briefly to summarize here my experience. An MCP-PMT is a photon multiplying tube that differs with respect to …
In a previous post I presented a brief bibliographical research on what is supposed to happen in a silicon detector when 1) a MIP particle passes through it and 2) when an infrared laser pulse is shined onto it. Today I want to bring this to real life and see what I get. I am …
In the lab I am currently characterizing silicon detectors using two types of sources to excite them: 1) a radioactive Sr-90 source and 2) a pulsed laser in a TCT setup. I want to do a theoretical comparison between these two ways of testing the detectors to improve my understanding of what happens in each …
The other day I decided to start working on the MIP calibration of the TCT and so I installed one of the PIN diodes we have. To do the MIP calibration basically we have to compare the collected charge when the device is excited by a MIP particle, e.g. a beta electron, and the collected …
Strange bipolar current pulses in PIN diode with beta source Read More »
