1. ZDC for BM&N Preliminary results for 2 H and 12 C beam with energy T=3.5 GeV/nuclon JINR Dubna, LHEP February - March 2015 Gavrishchuk O.P.

2. ZDC Setup, February 2015

3. ZDC Setup 52 modules – ready for beam testing 1.ZDC setup consist of 25 modules: 36 – central part, 75x75 mm 2 16 – peripheral part, 150x150 mm 2 Zdc_52

4. 6 Li 12 C 4 He 9 Be 1H1H

5. dE/dX for all particles In scint. counter of 5х5 cm 2, Thickness = 5 mm. Scint. count. installed in front of ZDC 12 C 6 Li 9 Be 4 He 1H1H dE/dX spectra of scintillation counter

6. 12 C peak was selected using dE/dX (slide 5) 12 C beam, T=3.5 GeV/N, Total ZDC spectrum

7. 6 Li peak was selected using dE/dX (slide 5)

8. 1. Layer 1 – Peripheral part of 25 modules 150x150 mm 2 Layout of groups for Total Sum 2. Central Part of 20 modules 75x75 mm 2 3. Layer 3 – Peripheral part of 16 modules 75x75 mm 2. ZDC Setup Layout for Total Sum grouping

9. Total Sum in ZDC, 12 C beam, no Tagret Layer 1 16 mod. 150x150 mm 2 Layer 2 20 mod. 75x75 mm 2 Layer 3 16 mod 75x75 mm 2 Total Sum of 52 mod.

10. Total Sum distribution in ZDC, 12 C beam, Copper Targret Layer 1 16 mod. 150x150mm 2 Layer 2 20 mod. 75x75mm 2 Layer 3 16 mod 75x75mm 2 Total Sum of 52 mod.

11. Deytron ( 2 H) beam 3.5 GeV/N No target, beam impact in center of ZDC Deytron peak position in ZDC via total sum of 52 modules selected using dE/dX condition

12. Total ADC Sum for selected groups 2 H beam located in center, no target Layer 1 16 mod. 150x150 mm 2 Total of 52 mod. Layer 3 16 mod. 75x175mm 2 Layer 2 20 mod. 75x75 mm 2

13. Total sum distribution 2 H beam located in center, no target Layer 1 16 mod. 150x150 mm 2 Layer 3 16 mod. 75x75mm 2 Layer 2 20 mod. 75x75 mm 2 Total Sum of 52 mod.

14. Total sum distribution 2 H beam with copper no target Layer 1 16 mod. 150x150 mm 2 Layer 2 20 mod. 75x75 mm 2 Layer 3 16 mod. 75x75 mm 2 Total Sum of 52 mod.