1. Supervisor: Amos Breskin
Conception and preparation of a gaseous photon detector for UV light based on parallel plate avalanche chamber
Armin Ridinger
Thomas Baumgartner
Mentor: Dirk Moermann
Supervisor: Amos Breskin

2. Principles of Operation
schematic plot of a gas avalanche
anode wire

3. The construction of our Detector

4. The MicroCAT meshes we used

5. Number of photoelectrons leaving attracted by M1 in function of the Voltage on M1
1. Measurement in vacuum M1 M2 M3
+HV I
Number of photoelectrons leaving, pass trough holes of the mesh and go to M3 in function of the Voltage on M3 M1 M2 M3 I
+HV

6. 2. Measurement in vacuum
There is a constant Voltage of +800 Volts on M3.
While we changed the Voltage on M1 M1 M2 M3
+/- HV I I
+800 V
Number of electrons who leave the photo cathode
Number of electrons who get to M3