1. HEPD test @ BTF and Trento Facility Calorimeter preliminary results
Beatrice Panico
Giuseppe Osteria
Francesco Perfetto
Valentina Scotti
INFN Napoli

2. HEPD accelerator test HEPD QM Electrons
Frascati BTF (25 April- 01 May 2016)
Energy range 30 Mev – 150 MeV
HEPD FM
Frascati BTF (3-5 October 2016)
Energy range 30 Mev – 120 MeV
Protons
Trento facility (8-12 November 2016)
Energy range 37 MeV – 228 MeV

3. Electrons Test @ BTF QM & FM Setup
HEPD has been placed on a movable platform.
HEPD connected to EGSE which manages the main Power (29.5 V), the CANBUS and RS422 communications.
The EGSE and the platform are both remotely controlled from the Control Room.
All the measurements have been done with the beam perpendicular to the HEPD window except for 2 positions

4. Test @ BTF: configurations
The HEPD has been tested with electrons beam of different energies and incident position.
The Beam Energies used for tests are: 150 – 120 – 90 – 60 – MeV.
The tests have been performed at different incident beam positions
Window
Silicon ladder
Trigger Counters
Calorimeter
Veto
Runs taken with:
different trigger masks
different veto settings
Hot and Cold chains
different PMT thresholds

5. Electrons 30 MeV Side A + Side B Pedestals subtracted
Trigger paddle T5
ADC distribution
Side A + Side B
Pedestals subtracted
1st Calorimeter pad P1

6. Electrons 30 MeV
Total charge measured in the Calo (∑i Pi)
1 e-

7. Electrons 30 MeV
Total charge measured in the Calo (∑i Pi)
2 e-

8. Electrons 30 MeV
Total charge measured in the Calo (∑i Pi)
3 e-

9. 30 MeV - Total charge measured vs. number of hit Calo counters
Electrons 30 MeV
30 MeV - Total charge measured vs. number of hit Calo counters
Number of hit plane of th calorimeter

10. Electrons 30 MeV
Total charge measured in the Calo for different impact point of the beam

11. Electrons 45 - 120 MeV 45 MeV Sigma/peak 60 MeV 0.07 Sigma/peak 0.11
0.10
90 MeV
Sigma/peak
0.10

12. Electrons MeV
Energy resolution

13. Simulated data
Electrons 80 MeV
Electrons 100 MeV

14. Electrons 30 – 120 MeV Energy loss in the Calo Event selection:
No Lateral Veto Hit
No Bottom Veto Hit
More than 12 crossed planes

15. Electrons 30 – 120 MeV Energy loss in the Lyso Event selection:
No Lateral Veto Hit
No Bottom Veto Hit
More than 12 crossed planes
Counts are normalized to LYSO central counts

16. Electrons 60 – 120 MeV Energy loss in the Lyso 60 MeV Sigma/peak 0.09
Event selection:
No Lateral Veto Hit
No Bottom Veto Hit
More than 12 crossed planes
One electron in the trigger plane
Energy loss in the Lyso
60 MeV
Sigma/peak
0.09
120 MeV
Sigma/peak
0.14
90 MeV
Sigma/peak
0.09

17. Proton Test @ Trento facility
FM Setup
HEPD has been placed on a movable platform.
HEPD connected to EGSE which manages the main Power (29.5 V), the CANBUS and RS422 communications.
The EGSE and the platform are both remotely controlled from the Control Room.
All the measurements have been done with the beam perpendicular to the HEPD window
Beam Energies:
37 – 51 – 70 – 100 – 125 – 154 – 174 – 202 – 228 MeV

18. Protons MeV
Number of hit Calo planes

19. Protons 37 – 100 MeV Energy loss in the Calo 37 MeV Sigma/peak 51 MeV
0.11
51 MeV
Sigma/peak
0.09
70 MeV
Sigma/peak
0.08
100 MeV
Sigma/peak
0.08

20. Protons 125 – 228 MeV Energy loss in the Calo 125 MeV Sigma/peak 0.07
0.17
228 MeV
Sigma/peak
0.08
174 MeV
Sigma/peak
0.09

21. Protons 174 – 228 MeV Energy loss in the LYSO 174 MeV 154 MeV
Sigma/peak
0.09
154 MeV
Sigma/peak
0.33
228 MeV
Sigma/peak
0.05

22. Electrons and protons Energy loss in the Calo Fully contained protons
Not contained protons

23. Electrons and protons
Energy Resolution

24. Electrons and protons Particle Identification (only Calo)
Protons 100 MeV
No lateral Veto Hit
No Bottom Veto Hit
preliminary
Electrons 90 MeV
No lateral Veto Hit
No Bottom Veto Hit

25. Conclusions
HEPD calorimeter is able to measure electrons in the energy range Mev with an energy resolution better than 10%.
HEPD calorimeter (FM) was able to measure protons in the energy range 37 – 228 MeV with a good linearity and with an energy resolution better than 10%
Preliminary results on particle identification (electron/proton)