FoCal PAD status in Japan!"#$%&"'()%*+',-./01'+2'!$%3%4"5'6%.7'89':;8<'=>?(@'("A+'B77#/.C'/.'!+3&+':;8<Test beam members for FoCal PAD (JP)Tatsuya Chujo 1,Yusuke Fukuda 1, Masahiro Hirano 1,Motoi Inaba 2, Kyoichiro Ito 1, Byung Chul KIM 1,Sakiko Kudo 1
with the support by MAPS group
A. van den Brink 3, Marco van Leeuwen 3,Thomas Peitzmann 3, Hongkai Wang 3, Chunhui Zhang 3
1. University of Tsukuba
2. Tsukuba University of Technology
3. Utrecht University, NIKHEF

Data	  analysis	  for	  2015	  test	  beam	  has	  been	  done	  by	  M.	  Hirano	  (master	  thesis	  2016)

ALICE Calo Meeting in Tokyo 2016, June 1, 20162

W layers（4x 1X0）

Analog summingboard

Si PAD(4 layers)!"#$%&'()&*+","&,-*./&0&1.23.4,&56789:

summing board

APV25

beam

FOCal PAD (4 segments)

MAPS

Test	  beam	  setup	  @	  PS	  (same	  for	  SPS)	  in	  2015

FoCal test bench @ Tsukuba
mmDAQ

SRS	  readout	  system• SRS	  readout	  system	  +	  APV	  25	  hybrid	  readout	  system.	  
• Same	  system	  has	  been	  used	  for	  the	  PS/SPS	  test	  beam.	  

ALICE Calo Meeting in Tokyo 2016, June 1, 2016

Si	  with	  cosmic	  ray	  measurements
52015 Data summary (PS)Beam energy (GeV/c)
-0.5
-1.0
-1.0
-2.0
-2.0
-3.0
-3.0
-4.0
-4.0
-6.0
-6.0
-8.0
-8.0
-10.0
-10.0

Trigger*eeheheheheheheh

No. of events
23k
15k
7.5k
15k
20k
19k
10k
7.6k
7.7k
0.6k
32k
0.5k
26k
1.4k
5.0k
*e: e- trigger (CH ON)
h: hadron trigger (CH OFF)

ALICE Calo Meeting in Tokyo 2016, June 1, 2016

6

2015 Data summary (SPS)

ALICE Calo Meeting in Tokyo 2016, June 1, 20167

Pulse	  shapeAnalog	  signal	  measured	  by	  by	  APV25	  2	  GeV/c,	  e+	  beam	  @	  PS	  (2015)

ALICE Calo Meeting in Tokyo 2016, June 1, 20168

Electron signal & noise rejection
LGL1

LGL2

LGL3

LGL4

Hit	  distribution	  	  before	  pedestal	  cut

Hit	  distribution	  with	  	  q_max	  >	  4σ+	  pedestal	  •Signal selection:1) Time bin cut (select q_max region) for each LGL2) Straight line (q_max) through from LGL1 to LGL4, avoiding dead channel area3) 3 x 3 clustering around a channel of q_max.
4) Noise event rejection.

ALICE Calo Meeting in Tokyo 2016, June 1, 201690.5GeV

0.1

1GeV
2GeV
3GeV
5GeV

0.08

number of event

number of event

Pulse hight distributions (beam energy dep. @ PS/SPS)

0.12

10GeV
20GeV
30GeV

0.1

40GeV
50GeV

0.08
0.06

0.06
0.04

0.04
0.02

0.02
00

2000

4000

6000

8000

10000 12000
ADC_sum'?&5CJD&K&D&G.LMN:

0020

40

6080! 10100 120 140 160 180 200
ADC_sum

3?'?&50C&K&DC&G.LMN:

ALICE Calo Meeting in Tokyo 2016, June 1, 201610

Linearity• Good linearity
within ~3%from PS to SPSenergies.

ALICE Calo Meeting in Tokyo 2016, June 1, 201611

Energy resolution• Stochastic term: close to
the expected value.
• Constant term: < 10%• trying to reduce it byremoving noise onelectronics…

ALICE Calo Meeting in Tokyo 2016, June 1, 201612

Next steps:• NIM publication using 2015 data.
• Preparation of the SPS test beam (Sep 7-13, 2016).
- New summing board (M. Inaba) to reduce the noise.
- Readout with wider dynamic range (above 60 GeV/c
up-to 150 GeV/c).
- Matching of MAPS data.
- More test on VMM2/3 @ CERN RD51.
• New detector design for Mini-FoCal.
• New budged request in 2016 (stronger physics cases,LoI, schedule for construction & physics measurement).

ALICE Calo Meeting in Tokyo 2016, June 1, 201613

Tsukuba joined RD51 collaboration• R&D and test for VMM2 and VMM3 hybrid boards with SRS +DATE (ALICE DAQ) system.
• R&D of combined design; on-board VMM2/3 on FoCal summingboard, and modification for FoCal needs (dynamic range & triggercapability)• Joined collaboration in 2015, Oct.
• Finish R&D in 2 years (2016 - 2018)• Production in 2019 for FoCal.
ALICE DATE for VMM (developed by RD51)

SRS readout

LOOB

ALICE Calo Meeting in Tokyo 2016, June 1, 201614

FoCal collaboration in Japan••

Hiroshima University

University of Tsukuba & Tsukuba
Tech. Univ.

•Representative: Toru Sugitate•

Members:•

Representative: Tatsuya Chujo*••

Members: Oliver Busch, Tatsuya Chujo,ShinIchi Esumi, Motoi Inaba**, YasuoMiake

Responsibility: Mechanical structure design,Integration, Detector performance evaluation•Responsibility: Project management for
FoCal Japanese institutes, PAD (LGL)
Detector design & construction, Detector
performance evaluation, simulation,
Readout system (SRS, APV/VMM),
summing board* Contact person of FoCal Japan** Tsukuba University of Technology

I&5D:&A41,A,=,A"41/&P&@$N=%,-&3.3<.+1/&&
Q&R&2+$E=$,.M=4E.+&2+$EJ&1,=E.4,1&
5$1&"@&S=4.&0/&BC0T:••(same as Representative)

Nagasaki Institute of Applied Science(NiSA)•

Representative: Ken Oyama•

Members: Hideki Hamagaki, Ken Oyama•

Responsibility: Readout system (SAMPA,CRU)

Nara Women’s University•

Representative: Maya Shimomura•

Responsibility: test beam experiment, datacalibration

ALICE Calo Meeting in Tokyo 2016, June 1, 201615

Summary• Encouraging results from the 2015 test beam data.
• Expected improvements in 2016 test beam by thenew summing board w/ wider dynamic rage.
• Joined RD51 to continue R&D for readout.
• Evolving FoCal collaboration in Japan.
• Tsukuba, Tsukuba Tech, Hiroshima, Nagasaki,Nara Women’s.

ALICE Calo Meeting in Tokyo 2016, June 1, 201616