Roman Dzhygadlo, GSI, Update on the Barrel DIRC
Prototype Test@CERN Jul-Aug, 2018
The new setup contained a prism with 33 degree opening angle,
a narrow bar as radiator, a new three-layer spherical lens,
and a readout with 4x2 MCP-PMTs. The results with tagged pions and
protons from a TOF-system showed that the PID requirements within the
expected phase space are met.

Ilknur Köseoglu, Giessen, Preliminary Results of CERN Testbeam 2018 for Endcap
DISC DIRC Prototype
In the same beam time as above, the EDD was tested. Nine focusing elements,
three read-out modules and three photosensors were used. The MCP-PMTs were 
Photonis Aqua, a Photonis with 2mm gap, and a Hamamatsu-Tube. The 960 channels
were readout by the TOFPET system with 18 ASICs. The channels were
time corrected with laser data. In all three read-out modules the
Cherenkov images were observed.

Daniel Miehling, Erlangen, Update on MCP-PMT oscillations and first
try of CE measurement
Ringing and oscillations of MCP-PMTs from Hamamatsu, JS0022 and YH0250,
are observed when the tubes have multiple hits.
The damping by resistors in single channels,
the other channels being grounded, showed no success. First measurements of
the collection efficiency of MCP-PMTs were done. Reasonable values of
about 60% for a Photonis XP85012 were measured.

Carsten Schwarz, GSI, MCP-PMT Ringing
The Ringing of a Photonis XP85012 MCP-PMT could be damped by 75 Ohms resistors
attached to all 64 channels.

Markus Pfaffinger, Erlangen, Update on lifetime measurements and
first results with new Photek sensor
The aging of the some detectors reach now 40 years of PANDA. Most sensors
with ALD coated MCPs have lifetime > 5C/cm². All non ALD devices have a
lifetime of < 200mC/cm². New in the setup is a Photonis 9002108 with high
collection efficiency. The Photonis XP85012 90001393 reaches now 21 C/cm2
twice the requirements for the PANDA lifetime.
First measurements with a Photetek MCP-PMT was performed.It has a
low dark current, low after pulsing a good timing resolution
of 40ps but cannot reach a gain of 1e6.  

Márton Németh-Csóka, Erlangen, Results of recent magnetic field measurements
Two MCP-PMTs from Hamamatsu (R13266-07-M64M) and Photonis (XP85112-Q-HA) were
measured in a magnetic field of up to 1.8 T in Juelich. The change 
of gain, cross talk and after-pulsing was measured. The gain for all
detectors stays larger than 5e5 at 1 Tesla.


Erik Etzelmüller, Giessen, Recent studies regarding the Endcap Disc DIRC
Erik gave an overview what their five students are doing. The activities
include EDD simulation studies, transmission measurements of optical filters,
focusing properties of the light guides and the status of the cosmic station for
measuring muons.

Sergey Kononov, BINP, Some results from the FRICH prototype test beam at BINP. 
Sergey showed the PANDA FRICH baseline design and results of electron test
beams at BINP. The measurements were done with 4 H12700 MaPMT readout by PADIWA
and a TRB3 board. The radiator was a stack of aerogel pieces. He showed parts
of the Cherenkov ring. The results were compared to measurements
with 2 Planacons. He also observes oscillations in the tube for large
amplitudes coming probably from beam particles hitting the tube.