Conveners
Precision Timing Detectors
- Giulio Pellegrini (Universidad de Valencia (ES))
Avalanche Photo Diodes (APDs) produced by Radiation Monitoring Devices are examined as candidate timing detectors for HL-LHC applications.
These APDs are operated at 1.8 kV, resulting in a gain of up to 500.
The timing performance of the detectors is evaluated using a pulsed laser.
The effects of radiation damage on current, signal amplitude, noise, and timing of the APDs are evaluated...
In view of the future HL-LHC upgrade, a variety of technologies are being considered for particle tracking. One of these technologies is Deep Diffused APDs (DD-APDs). Several DD-APDs were characterised through CV/IV and TCT measurements before and after neutron irradiation. The irradiation took place at the Jožef Stefan Institute (Ljubljana, Slovenia). The fluences to which the devices were...
We will discuss mainly gain and timing resolution of thin LGAD both before and after neutron irradiation.
In the past year, the CMS and ATLAS collaborations have defined the detector geometry of their respective timing layers. Even though both collaborations have selected UFSD in their baseline design, the requirements for the two experiments differ in key aspects such as with pixel size, radiation hardness, number of layers. In this contribution we review the requirements and challenges in the...
Over the last few years, Fondazione Bruno Kessler, in collaboration with the universities of Trento and Turin, has been involved in developing of Silicon sensors with low internal gain, the so-called Ultra-FAST Silicon Detectors (UFSD). Such a detector is based on the concept of Low-Gain Avalanche Detectors (LGAD), which are silicon detectors with an internal, low multiplication mechanism...
AC-LGAD are LGAD with simplified structure.
Basically all segmentation in the P+, N+ and oxide are eliminated and only the AC-coupled metal contact is segmented.
We have tested with laser, beta and alpha the first prototypes from CNM Run 10478 which were produced without optimization of the doping profile and simulated the response with TCAD and SPICE. A program going forward is described.
An in-deep study of a p-in-p LGAD prototype (dubbed as I-LGAD) is presented. Contrary to the conventional LGAD devices, currently proposed for the HL-LHC mip timing detectors, the I-LGAD has a non-segmented deep p-well ( the multiplication layer). Therefore, I-LGADs should idealy present a constant gain value over all the sensitive region of the device without gain drops between the signal...
