1. SHiP combined test beam 13 September – 2 October
Basis for section in TP addendum 1 1

2. Devices under tests Straw Tracker: CALO (TP option):
2 m long / 20 mm diameter, 30 µm wire
Tracking telescope: 8 Si sensors, about 94 mm x 92 mm provided by Nicola Neri (LHCb Milano group
CALO (TP option):
HCAL prototype (a spare module of LHCb HCAL) in vertical position, beam
points to its side 16×1.2λ longitudinal segmentation
ECAL prototypes (Shashlik, 3 different versions)
infrastructure (beam scintillators, tracker, DAQ) shared with SST
Surround Background Tagger Liquid Scintillator option
Liquis scintillator module, linear alkylbenzene (LAB)
Plastic scintillator trigger system
Emulsion for charm production measurement in long target
Emulsion mover
Emulsion + silicon pixel tracker from Bonn 2

3. Plan 3

4. Plan 4

5. SHiP SBT LScin Test Beam
Team:
Heiko Lacker (HU Berlin)
Ievgen Korol (HU Berlin)
Plamenna Venkova (HU Berlin)
Maximilian Ehlert (HU Berlin)
Julian Schliwinski (HU Berlin)
Alexander Korzenev (Uni Geneva)
Annika Hollnagel (JGU Mainz) 5

6. SHiP SBT LScin Test Beam
Measurement agenda:
Efficiency & time resolution as function of beam position & incident angle
Spatial resolution
Difference in response to e, µ, hadrons
WOM SiPM readout (proof of concept)
SiPM vs. PMT readout 6

7. SHiP SBT LScin Test Beam
SBT LScin module:
Liquid scintillator-filled box: 50 x 50 x 25 cm³
LAB (linear alkylbenzene)
PPO (wavelength-shifter)
N2 flow
3 WOM:
2 equipped with 1 PMT
1 equipped with 8 SiPM
PMT
WOM
SiPM 7

8. SHiP SBT LScin Test Beam
WOM & readout:
WOM: Wavelength-shifting optical module
Adiabatic light guide
Readout via PMT or SiPM
WaveCatcher module: Recording of waveforms of all signals (2x PMT, 8x SiPM)
WOM
SiPM module
end of adiabatic
light guide 8

9. SHiP SBT LScin Test Beam
Trigger & veto: Plastic scintillators
2 beam counters:
2 x 2 x 2 cm3
3 veto bars:
50 x 6 x 1 cm³
1.5 cm
Upstream of LScin module
beam counters
beam 9

10. SHiP SBT LScin Test Beam
Data taking:
DESY table: horizontal & vertical movement
Custom rotation table:
5° steps
Measurements at 0°, ±30°, ±45°, ±60°, ±90°...
Steel plate module (optional):
3.45 cm thickness
Emulation of decay vessel (electromagnetic showers) x x x x
steel plate x x x x x
beam 10

11. SHiP SBT LScin Test Beam
Setup & installation at SPS NA T2 H2: –
LScin
module
LScin
module
beam
beam
veto &
trigger
veto & trigger 11

12. SHiP SBT LScin Test Beam
Beam SPS NA T2 H2: :00h – :00h
Secondary particles: µ, hadrons (150 GeV/c2)
Tertiary particles: e (20 GeV/c2)
Different positions & incident angles:
5000 rec. events per position / rotation for µ, hadrons
600 rec. events per position / rotation for e
3.45 cm steel plate: Emulation of decay vessel wall
Particle type
p [GeV/c2]
# recorded events e 20
11 500
150
hadrons 12

13. SHiP SBT LScin Test Beam
Summary:
Data taking with e, µ, hadrons at various positions & incident angles
Successful operation of LScin module
Successful SiPM readout of WOM
Very different response to e, µ, hadrons when operating with steel plate (decay vessel emulation)
Many thanks to the SPS NA beamline operators! 13