1. Sergej, Sacha, Meny, (Itamar), Yan
Beam Cal study
Sergej, Sacha, Meny, (Itamar), Yan

2. Reminder …. 2014
Sergej and Lucia proposed a new BeamCal design

3. Sergej 2014
BEAM

4. Sergej 2014

5. 2017 In the last months, we decided to explore this idea
We started discussion between TAU and Sergej
We reached new ideas that still are under discussion. Main concerns:
Avoid to machine very precisely the tungsten plane
Maybe avoid the PCB
Simplification of the kapton

6. spacer
Tungsten present proposal
Tungsten new proposal

7. 1st layer
HV line
Readout lines
Blue :Kapton with the readout signal
Glued to the sapphir detector
10 readout lines
Green : sapphire detector
Red : Kapton with HV line

8. 2nd layer
Readout lines
HV line
Blue :Kapton with the readout signal
Glued to the sapphir detector
10 readout lines
Green : sapphire detector
Red : Kapton with HV line

9. Beam view
Side view
Absorber
I draw only nine strips inserted into
The absorber

10. Fake construction
Tungsten
Sapphire sensor (300um)
Spacer (500um)

11. spacer
tungsten
sensor

12. 1 3 2 4

14. Fake readout kapton

15. Back view
Front view

17. conclusion Sapphire sensor beamcal has been proposed 2014 by Sergej
Discussions/propositions are on going to simplify what can be simplify
Need to find a readout. Maybe APV is ok
Hope to reach a proposal in the next months
We will need then a discussion into the FCAL community :
do we want to push it forward (TB) ?
Who ?
Funding ?
When ?