Status of the PANDA Endcap Disc DIRC Project, İlknur Köseoğlu-Sari, Giessen

The progress on the read-out system and mechanical setup was presented.
The space requirements are still a problem and solutions are needed. This concerns HV cables, LV cables optical links and the cooling system for the FPGA.
Search for space in direction towards the GEM tracker are not yet successful.
Ilknur showed also updated results of the test beam at CERN 2018.

Tests of MaPMT and electronics for Forward RICH, Ivan Kuyanov, Budker.

Ivan showed the PANDA Forward RICH baseline design and reported about
test beam results with electrons at the BINP VEPP-4M accelerator in 2019.
They measured 128 electronic channels with PADIWA+TRB3 and the
other 128 channels with the DiRICH system. They measure 1.8 times less
photons than expected. The reason for that is a reduced QE of the
MAPMT (H12700) which was was confirmed by a laser measurement.

Status of Barrel DIRC Call for Tenders, Jochen Schwiening, GSI

Jochen explained the current status of the tender process of the MCP-PMTs.
The two vendors agreed to produce a demonstrator to allow measurements and
verification of the required specifications.

Update on lifetime measurements of MCP-PMTs and status of
afterglow and saturation measurements, Daniel Miehling, Erlangen

Daniel showed the updated accumulated charges of the MCP-PMTs. For Photonis
the best sensor is at 25 C/cm2 and for Hamamatsu at almost 11C/cm2. He showed
effects of afterglow, saturation and recovery time. They affect
not the Barrel DIRC but shoud be further investigated for the EDD.

Further investigations of Photonis 9002150, DiRiCH and Photonis ES440,
Merlin Boehm, Erlangen

Merlin showed 140ps and 125ps  timing precision  of the DIRICH system when
using a 1pf and 10pf signal shaping capacitor, respectively. Other capacity
values should be measured in the future.