Progress of GEM RD in Lanzhou Univerity Yi

Progress of GEM R&D in Lanzhou Univerity Yi Zhang

Contents • Time properties of GEM-detector signal • R&D of GEM detector • R&D of GEM-Daq • Future plan Aug. 11, 2016 Prog. of GEM R&D in LZU 2

Time properties of MPGD signals • Fast raising time • Signal duration depends on the way of energy deposition – Particle identification by cut on time • The maximum duration is independent of incidental energy – Correct the initial position Aug. 11, 2016 Prog. of GEM R&D in LZU 3

Goal • reduce the local rates by rejecting γ signals according to the time information • try to reduce the load of DAQ by clustering on hardware level (FPGA) Aug. 11, 2016 Prog. of GEM R&D in LZU 4

To demonstrate the conclusions, a test was done Mean=89. 4 ns σ= 1. 744 Mean=135. 7 ns σ= 22. 8 SP-ADQ 412: 1. 8 GHz Aug. 11, 2016 Prog. of GEM R&D in LZU 5

Garfield++ simulation of the double GEM (reference) Edrift=1 k. V/cm EGem=58. 33 k. V/cm gain=9032 Garfield++ simulation of the double GEM + Mesh Edrift=1 k. V/cm EGem=58. 33 k. V/cm Eamp=40 k. V/cm gain=68930 Aug. 11, 2016 Prog. of GEM R&D in LZU 6

R&D of GEM detector Aug. 11, 2016 Prog. of GEM R&D in LZU 7

New readout panel To APV 25 167 channels in 10 cm PANASONIC 130 P Aug. 11, 2016 Prog. of GEM R&D in LZU 8

New version of triple-layer GEM detector Aug. 11, 2016 Prog. of GEM R&D in LZU 9

High voltage and trigger HV 5 M 10 M 6 KV 103 M drift electrode 10 M MPD+V 1218 CF 8000 discriminator }GEM III 15 M Aug. 11, 2016 6 KV 103 M Trigger Prog. of GEM R&D in LZU 10

Test result of new detector (55 Fe) σ~127 um σE~19. 5% σ~127 um Aug. 11, 2016 Prog. of GEM R&D in LZU 11

x-ray imaging by new detector and Daq 10 cm detector & daq system Aug. 11, 2016 Prog. of GEM R&D in LZU 12

R&D of GEM-Daq Aug. 11, 2016 Prog. of GEM R&D in LZU 13

coincidence trigger to identify muon and photon Aug. 11, 2016 Prog. of GEM R&D in LZU 14

Real signals recorded in Daq - μ smic co 55 Fe Aug. 11, 2016 Prog. of GEM R&D in LZU 15

comparing signal amplitudes of different particle x-ray in 1 period x-ray in mutil period muon in 1 period Aug. 11, 2016 Prog. of GEM R&D in LZU muon in mutil period 16

Avalanche electrons collected on by detector (simulation) Aug. 11, 2016 Prog. of GEM R&D in LZU 17

Steps of online track reconstruction • Divide signals into time slices (1 period for each) – Segmentation in readout plane —— cut on signal amplitude – Combine adjacent segment —— identify clusters of hits • Process multi time slices – Combine adjacent time slices —— distinguish if signal continues – Integrate multi time slices —— identify the start and end of a signal Aug. 11, 2016 Prog. of GEM R&D in LZU 18

Forming hit clusters in one time slice (simulation) Aug. 11, 2016 Prog. of GEM R&D in LZU 19

Development board: ARRIA GX FPGA toolkit EP 1 AGX 60 DF 780 C 6 N Aug. 11, 2016 Prog. of GEM R&D in LZU 20

Forming hit clusters in 1 time slice fake data test (27× 27 chns) Aug. 11, 2016 Prog. of GEM R&D in LZU 21

Used FPGA periods Processing speed VS signal coverage ratio Ratio of fired channels in 1 period (%) Aug. 11, 2016 Prog. of GEM R&D in LZU 22

Resources consumption budget (2048 chs) reports of our code: from INFN : Iterms of resources Usage of current daq Usage of out code Combinational ALUTs 48, 080 21, 247 (44%) 14, 092 (29%) Dedicated registers 48, 080 13, 382 (28%) 32, 224 (67%) 256 0 3(1%) 2, 528, 640 1, 808, 252 (72%) 73, 216 (3%) DSP Block Memory Bits Aug. 11, 2016 Total Prog. of GEM R&D in LZU 23

Combine few time slices, get the complete tracks (simulation) Aug. 11, 2016 Prog. of GEM R&D in LZU 24

Identify the tracks (simulation) Aug. 11, 2016 Prog. of GEM R&D in LZU 25

Try to identify signals of different particle (data) period 2/period 1 Aug. 11, 2016 period 3/period 1 Prog. of GEM R&D in LZU period 3/period 2 26

γ background in So. LID GEM 5 k. Hz/mm 2 from So. LID Pre. CDR Aug. 11, 2016 Prog. of GEM R&D in LZU 27

primary electron-ion couples in triple GEM Aug. 11, 2016 Prog. of GEM R&D in LZU 28

Signals induced by 1 track FEE rising time (22 ns) included Aug. 11, 2016 Prog. of GEM R&D in LZU 29

Future plan • process multi time slices on FPGA • test with real beam data? • communicate with INFN experts – try to merge our code into current firmware Aug. 11, 2016 Prog. of GEM R&D in LZU 30

Thank you !

Aug. 11, 2016 Prog. of GEM R&D in LZU 32