Belle II Trigger/DAQ Workshop 2022

29 Nov 2022, 08:00 → 2 Dec 2022, 20:40 Asia/Tokyo

Nara Women's University

The annual Belle II Trigger/DAQ workshop has been resumed.

The workshop is held in a hybrid-style with both face-to-face and remote connection. Under the still on-going CoViD-19 situation, the on-site participation in the workshop is limited up to 30 persons and thus by-invitation only. If you are interested in the on-site participation, please contact TRG/DAQ leaders.

The main topic of the workshop is to discuss the possible improvement and development for "Long Shutdown 2(LS2)" and beyond. The discussion includes the application of machine learning for the automatic optimization of TRG/DAQ condition in beam, and the approach for the triggerless DAQ

 

IMGP6826.JPG

Tuesday, 29 November

Registration

Opening Session

Zoom link : https://us06web.zoom.us/j/82590498312?pwd=UkRzY0RnU2xOU0FHcWIwSjdneElydz09

Convener: Ryosuke Itoh (BELLE (BELLE II Experiment))

1 Welcome

Speaker: Prof. Hisaki Hayashii (BELLE (BELLE II Experiment))

DAQTRG-workshop-2022-welcome.pdf

2 Logistics

Speaker: Kenkichi Miyabayashi (BELLE (BELLE II Experiment))

3 Introduction ans Status (Trigger)

Speaker: Hideyuki Nakazawa (BELLE (BELLE II Experiment))

4 Introduction amd Statis (DAQ)

Speaker: Mr Seokhee Park (BELLE (BELLE II Experiment))

TRGDAQ-DAQ-summary-221129-psh.pdf

10:30 Break

Detector Session

Zoom : https://us06web.zoom.us/j/82590498312?pwd=UkRzY0RnU2xOU0FHcWIwSjdneElydz09

Convener: Ryosuke Itoh (BELLE (BELLE II Experiment))

5 CDC

Speaker: Yu Nakazawa (BELLE (BELLE II Experiment))

20221129.pdf

6 Discussion

7 TOP

Speaker: Harsh Purwar (BELLE (BELLE II Experiment))

top_DAQ_Purwar.pdf

8 Discussion

12:20 Lunch

Detector Session

Zoom : https://us06web.zoom.us/j/82590498312?pwd=UkRzY0RnU2xOU0FHcWIwSjdneElydz09

Convener: Takuto Kunigo (BELLE (BELLE II Experiment))

9 ARICH

Speaker: Kenta Uno (BELLE (BELLE II Experiment))

ARICH_Kuno_20221129.pdf

10 Discussion

11 ECL

Speaker: Mikhail Remnev (BELLE (BELLE II Experiment))

2022.11.29_trgdaq_ecl_mikhail.remnev.pdf

12 Discussion

13 KLM

Speaker: Swagato Banerjee (University of Louisville (U.S.))

cketter_KLM_trg_daq_221129.pdf

KLM_TRGDAQ_Nara_29Nov2022.pdf

14 Discussion

15:45 Break

Detector Session

Zoom : https://us06web.zoom.us/j/82590498312?pwd=UkRzY0RnU2xOU0FHcWIwSjdneElydz09

Convener: Dr Dmytro Levit (BELLE (BELLE II Experiment))

15 SVD

Speaker: Katsuro Nakamura (KEK)

221129-SVDStatus_TRGDAQWS.pdf

16 Discussion

17 PXD

Speaker: Bjoern Spruck (BELLE (BELLE II Experiment))

2022_11_29_PXD_TRGDAQ_7.pdf

18 Discussion

Wednesday, 30 November

19 Trigger record

DAQ: TTD and COPPER

Zoom : https://us06web.zoom.us/j/82590498312?pwd=UkRzY0RnU2xOU0FHcWIwSjdneElydz09

Convener: Mikihiko Nakao (BELLE (BELLE II Experiment))

20 FTSW firmware overhaul project

Speaker: Mikihiko Nakao (BELLE (BELLE II Experiment))

20221130.nakao.firmware.pdf

21 FTSW4 development status

Speaker: Mikihiko Nakao (BELLE (BELLE II Experiment))

20221130.nakao.ftsw4.pdf

22 TTD software for non-stop DAQ

Speaker: Mikihiko Nakao (BELLE (BELLE II Experiment))

20221130.nakao.nonstop.pdf

23 Discussion

24 History of COPPER based readout

Speaker: Satoru Yamada (BELLE (BELLE II Experiment))

221130_COPPER_Yamada.pdf

Trigger: TOPTRG, KLMTRG

RoomC141

zoom (TRG parallel 30th Nov.)
https://us02web.zoom.us/j/81338380187?pwd=S2JhVVhRRmF5dXNxVUdZeTBmdnFmdz09
meeting ID: 813 3838 0187
pass code: 657363

zoom (TRG parallel 1st Dec.)
https://us02web.zoom.us/j/88159602719?pwd=dFVrLytENHpjZEZiSG1oMEJ3cGcrUT09
meeting ID: 881 5960 2719
pass code: 088161

25 TOPTRG status

Speaker: Tianping Gu (BELLE (BELLE II Experiment))

Tianping_Nov_30_2022_TRGDAQ.pdf

26 TOPTRG after LS1 and future plan

Speaker: Vladimir Savinov (BELLE (BELLE II Experiment))

savinov_TRG-workshop-Nov-2022.pdf

27 KLMTRG status

Speaker: Richard Peschke (BELLE (BELLE Gruppe))

2022-11 Trigger Meeting Peschke Straigt line fit TSIM VHDL.pdf

28 KLMTRG LS1 and future plan, human resource

Speaker: Kurtis Nishimura (BELLE (BELLE II Experiment))

2022.11.30.KLM.FW.Manpower.pdf

29 New participation from Sydney

Speaker: Yun-Tsung Lai (Belle (SuperKEKB Experiment))

20221130_TriggerDAQ_USyd_CLH_s.pdf

10:30 Break

DAQ: Event Builder and HLT

Zoom : https://us06web.zoom.us/j/82590498312?pwd=UkRzY0RnU2xOU0FHcWIwSjdneElydz09

Convener: Mikihiko Nakao (BELLE (BELLE II Experiment))

30 Event Builder

Speaker: Soh Y. Suzuki (KEK)

evb-20221130-v1.pdf

31 Discussion

32 HLT operation history and new framework

Speaker: Ryosuke Itoh (BELLE (BELLE II Experiment))

HLT-history.pdf

33 HLT test bench

Speaker: Chanyoung Lee (BELLE (BELLE II Experiment))

chanyoung_b2trgdaq2022.pdf

34 Discussion

Trigger: ECLTRG

RoomC141

zoom (TRG parallel 30th Nov.)
https://us02web.zoom.us/j/81338380187?pwd=S2JhVVhRRmF5dXNxVUdZeTBmdnFmdz09
meeting ID: 813 3838 0187
pass code: 657363

zoom (TRG parallel 1st Dec.)
https://us02web.zoom.us/j/88159602719?pwd=dFVrLytENHpjZEZiSG1oMEJ3cGcrUT09
meeting ID: 881 5960 2719
pass code: 088161

35 ECLTRG status

Speaker: Unno Yuji (BELLE (BELLE II Experiment))

20221130_trgdaq.pdf

36 ECLTRG calibration

Speaker: Eunji Jang

221130_ ECLTRG energy calibration.pdf

37 ECLTRG DQM

Speaker: HanEol Cho (BELLE (BELLE II Experiment))

TRG_DAQ_workshop_221130_hecho.pdf

38 ECLTRG LS1 and future plan

Speaker: Unno Yuji (BELLE (BELLE II Experiment))

12:20 Lunch

DAQ: DAQ upgrade (replacement of readout syetem)

Zoom : https://us06web.zoom.us/j/82590498312?pwd=UkRzY0RnU2xOU0FHcWIwSjdneElydz09

Convener: Satoru Yamada (BELLE (BELLE II Experiment))

39 Overall status and commissioning in LS1

Speaker: Satoru Yamada (BELLE (BELLE II Experiment))

221130_Commissionig_Yamada.pdf

40 Belle2link implementation and data-error check

Speaker: Yun-Tsung Lai (Belle (SuperKEKB Experiment))

20221130_PCIe40_firmware.pdf

41 B2tt firmware

Speaker: Dr Dmytro Levit (BELLE (BELLE II Experiment))

pcie40_b2tt.pdf

42 Slow-control preparation for SVD

Speaker: Qidong Zhou (BELLE (BELLE II Experiment))

TRGDAQ2022_QidongZhou_20221130.pdf

43 Slow-control preparation for CDC and ECL

Speaker: Harsh Purwar (BELLE (BELLE II Experiment))

belle2_daqUp_Purwar.pdf

44 Slow-control preparation for ARICH and TRG

Speaker: Yun-Tsung Lai (Belle (SuperKEKB Experiment))

20221130_PCIe40_ARICH_TRG.pdf

Trigger: VXDTRG, GDL, GRL

RoomC141

zoom (TRG parallel 30th Nov.)
https://us02web.zoom.us/j/81338380187?pwd=S2JhVVhRRmF5dXNxVUdZeTBmdnFmdz09
meeting ID: 813 3838 0187
pass code: 657363

zoom (TRG parallel 1st Dec.)
https://us02web.zoom.us/j/88159602719?pwd=dFVrLytENHpjZEZiSG1oMEJ3cGcrUT09
meeting ID: 881 5960 2719
pass code: 088161

45 VXD TRG R&D status

Speaker: Tomoyuki Shimasaki (BELLE (BELLE II Experiment))

20221130_SVDL1TRG_v2.pdf

46 GRL status and plan

Speaker: Taichiro Koga (BELLE (BELLE II Experiment))

koga_grl_2022_11_23.pdf

47 GDL status and plan

Speaker: Hideyuki Nakazawa (BELLE (BELLE II Experiment))

trgdq221130_GDL.pdf

15:00 break

15:05 break

Trigger: CDCTRG1

RoomC141

zoom (TRG parallel 30th Nov.)
https://us02web.zoom.us/j/81338380187?pwd=S2JhVVhRRmF5dXNxVUdZeTBmdnFmdz09
meeting ID: 813 3838 0187
pass code: 657363

zoom (TRG parallel 1st Dec.)
https://us02web.zoom.us/j/88159602719?pwd=dFVrLytENHpjZEZiSG1oMEJ3cGcrUT09
meeting ID: 881 5960 2719
pass code: 088161

48 CDCTRG major problem 2022

Speaker: Taichiro Koga (BELLE (BELLE II Experiment))

koga_cdctrg_2022_11_23.pdf

49 CDCTRG NN plans in LS1 and in the future

Speaker: Christian Kiesling (Belle/MPIM (H1 / MPI Muenchen))

TRGDAQ_Workshop_20221130_CK.pdf

50 CDCTRG NN simulation status

Speaker: Felix Meggendorfer (BELLE (BELLE II Experiment))

fmegg_20221130.pdf

51 CDCTRG NN with enriched input information

Speaker: Yuxin Liu (BELLE (BELLE II Experiment))

Liu_TRG-DAQ meeting.pdf

16:40 break

52 CDCTRG Displaced Vertex Track Segment Finder Status

Speaker: Marc Neu

53 Displaced vertex physics

Speaker: Torben Ferber (KIT)

2022_12_01_TRQWorkshop_ferber.pdf

54 CDCTRG displaced vertex

Speaker: Elia Schmidt (2024-08-15 00:00:00)

DVT_DAQ.pdf

55 CDCTRG GNN ADC and TDC study

Speaker: Philipp Dorwarth (BELLE (BELLE II Experiment))

2022-11-30-DAQ.pdf

56 CDCTRG GNN based tracking

Speaker: Lea Reuter (Belle II)

22_11_30_B2Trigger_GNNTracking_lreuter.pdf

57 CDCTRG LS2 and beyond

Speaker: Taichiro Koga (BELLE (BELLE II Experiment))

koga_cdcfe_2022_11_23.pdf

DAQ: DAQ upgrade (further improvements)

Zoom : https://us06web.zoom.us/j/82590498312?pwd=UkRzY0RnU2xOU0FHcWIwSjdneElydz09

Convener: Satoru Yamada (BELLE (BELLE II Experiment))

58 Software assited event-building

Speaker: Dr Dmytro Levit (BELLE (BELLE II Experiment))

pcie40_sweb.pdf

59 Development at IJClab : Double PCIexpress and optical b2tt

Speaker: Tak-Shun Lau (BELLE (BELLE II Experiment))

Development at IJClab.pdf

60 Interface between FEE and PCIe40

Speaker: Dr Dmytro Levit (BELLE (BELLE II Experiment))

pcie40_belle2link.pdf

61 DAQ upgrade paper

Speaker: Harsh Purwar (BELLE (BELLE II Experiment))

Comprehensive DAQ upgrade Manuscript.pdf

16:35 Short break

DAQ: DAQ network

Zoom : https://us06web.zoom.us/j/82590498312?pwd=UkRzY0RnU2xOU0FHcWIwSjdneElydz09

Convener: Mikihiko Nakao (BELLE (BELLE II Experiment))

62 DAQ servers and network

Speaker: Mikihiko Nakao (BELLE (BELLE II Experiment))

20221130.nakao.daqnet.pdf

63 Discussion

Thursday, 1 December

DAQ: STORE and ExpReco

Zoom : https://us06web.zoom.us/j/82590498312?pwd=UkRzY0RnU2xOU0FHcWIwSjdneElydz09

Convener: Mr Seokhee Park (BELLE (BELLE II Experiment))

64 STORE upgrade

Speaker: Mr Seokhee Park (BELLE (BELLE II Experiment))

TRGDAQ-STORE-221201-psh.pdf

65 Discussion

66 ExpressReco upgrade

Speaker: Mr Seokhee Park (BELLE (BELLE II Experiment))

TRGDAQ-ERECO-221201-psh.pdf

67 ExpressReco sampling and performance test

Speaker: Daniel Jacobi (BELLE (BELLE II Experiment))

Trigger_DAQ_WS_Daniel_Jacobi.pdf

68 Discussion

Trigger: CDCTRG2

RoomC141

zoom (TRG parallel 30th Nov.)
https://us02web.zoom.us/j/81338380187?pwd=S2JhVVhRRmF5dXNxVUdZeTBmdnFmdz09
meeting ID: 813 3838 0187
pass code: 657363

zoom (TRG parallel 1st Dec.)
https://us02web.zoom.us/j/88159602719?pwd=dFVrLytENHpjZEZiSG1oMEJ3cGcrUT09
meeting ID: 881 5960 2719
pass code: 088161

69 CDCTRG Mics. for data flow and Merger

Speaker: Yun-Tsung Lai (Belle (SuperKEKB Experiment))

20221201_mics.pdf

70 CDCTRG MGR board

Speaker: Jing-Ge Shiu (BELLE (BELLE II Experiment))

2022TRGDAQWS_merger.pdf

71 CDCTRG 2D status and plan

Speaker: Taichiro Koga (BELLE (BELLE II Experiment))

koga_2d_2022_11_24.pdf

72 CDCTRG 3D status

Speaker: Jie-Cheng Lin (BELLE (BELLE II Experiment))

20221201.pdf

73 CDCTRG 3D and ADC

Speaker: Hiroto Sudo (BELLE (BELLE II Experiment))

2022_12_01_TRGDAQWS.pdf

10:30 Break

DAQ: DQM and MiraBelle

Zoom : https://us06web.zoom.us/j/82590498312?pwd=UkRzY0RnU2xOU0FHcWIwSjdneElydz09

Convener: Bjoern Spruck (BELLE (BELLE II Experiment))

74 DQM status and upgrade plans

Speaker: Bjoern Spruck (BELLE (BELLE II Experiment))

2022_12_01_DQM_TRGDAQ_4.pdf

75 MiraBelle status and future plans

Speaker: Luka Santelj (Jozef Stefan Institute)

mirabelle_trgdaq.pdf

76 DQM SVD

Speaker: Francesco Tenchini (BELLE (BELLE II Experiment))

tenchini_svddqm_Nara.pdf

77 DQM ARICH

Speaker: Luka Santelj (Jozef Stefan Institute)

arich_dqm.pdf

78 DQM CDC

Speaker: Yu Nakazawa (BELLE (BELLE II Experiment))

20221201.pdf

79 DQM ECL

Speaker: Mikhail Remnev (BELLE (BELLE II Experiment))

80 DQM KLM

Speaker: Swagato Banerjee (University of Louisville (U.S.))

KLM_DQM_Nara_1Dec2022.pdf

81 DQM PXD

Speaker: Bjoern Spruck (BELLE (BELLE II Experiment))

2022_12_01_DQM_PXD.pdf

82 DQM TOP

Speaker: Harsh Purwar (BELLE (BELLE II Experiment))

top_DQM_Purwar.pdf

83 DQM TRG

84 Discussion

Trigger: Operation, injection veto

RoomC141

zoom (TRG parallel 30th Nov.)
https://us02web.zoom.us/j/81338380187?pwd=S2JhVVhRRmF5dXNxVUdZeTBmdnFmdz09
meeting ID: 813 3838 0187
pass code: 657363

zoom (TRG parallel 1st Dec.)
https://us02web.zoom.us/j/88159602719?pwd=dFVrLytENHpjZEZiSG1oMEJ3cGcrUT09
meeting ID: 881 5960 2719
pass code: 088161

85 Operation and monitoring

Speaker: Taichiro Koga (BELLE (BELLE II Experiment))

koga_operation_2022_11_24.pdf

86 Injection veto

Speaker: Taichiro Koga (BELLE (BELLE II Experiment))

koga_injectionveto_2022_11_24.pdf

87 UT4 production plan

Speaker: Taichiro Koga (BELLE (BELLE II Experiment))

koga_trg_ut4_2022_11_23.pdf

12:20 Lunch

Joint Session: Trigger and HLT

Zoom : https://us06web.zoom.us/j/82590498312?pwd=UkRzY0RnU2xOU0FHcWIwSjdneElydz09

Convener: Taichiro Koga (BELLE (BELLE II Experiment))

88 HLT general introduction

Speaker: Ryosuke Itoh (BELLE (BELLE II Experiment))

HLT-introduction.pdf

89 Expected L1 rate limitation and HLT processing time

Speaker: Karim Trabelsi (IJCLab (Orsay))

HLT_20221201 (002).pdf

90 Expected L1 rate in future

Speaker: Taichiro Koga (BELLE (BELLE II Experiment))

koga_trg_2022_11_24.pdf

91 Level3 trigger (Fast reco)

Speaker: Ryosuke Itoh (BELLE (BELLE II Experiment))

Level3.pdf

92 Discussion

Speaker: Taichiro Koga (BELLE (BELLE II Experiment))

15:10 Break

DAQ: Slow Control and DCS

Zoom : https://us06web.zoom.us/j/82590498312?pwd=UkRzY0RnU2xOU0FHcWIwSjdneElydz09

Convener: Takuto Kunigo (BELLE (BELLE II Experiment))

93 Status of Slow Control

Speaker: Takuto Kunigo (BELLE (BELLE II Experiment))

SLC_summary-compressed.pdf

SLC_summary.pdf

94 Discussion

95 DCS status

Speaker: Takuto Kunigo (BELLE (BELLE II Experiment))

DCS_summary_takuto.pdf

96 EPICS based DCS

Speaker: Bjoern Spruck (BELLE (BELLE II Experiment))

2022_12_01_EPICS.pdf

97 OPC based DCS

Speaker: Takuto Kunigo (BELLE (BELLE II Experiment))

DCS_OPC_takuto.pdf

98 Alarm system and Phebus upgrade

Speaker: Dr Michael Ritzert (not set)

Phoebus.pdf

99 Discussion

Trigger: Physics and trigger menu

RoomC141

zoom (TRG parallel 30th Nov.)
https://us02web.zoom.us/j/81338380187?pwd=S2JhVVhRRmF5dXNxVUdZeTBmdnFmdz09
meeting ID: 813 3838 0187
pass code: 657363

zoom (TRG parallel 1st Dec.)
https://us02web.zoom.us/j/88159602719?pwd=dFVrLytENHpjZEZiSG1oMEJ3cGcrUT09
meeting ID: 881 5960 2719
pass code: 088161

100 Trigger bit for lowmulti physics

Speaker: Enrico Graziani (INFN - Roma 3)

trigger-DSLM.pdf

101 Trigger bit for tau physics

Speaker: Alberto Martini (BELLE (BELLE Gruppe))

Martini_tauTriggers.pdf

102 Trigger bit for PID (two photon)

Speaker: Kenta Uno (BELLE (BELLE II Experiment))

PIDTrigger_Kuno_20221201.pdf

103 Bhabha veto

Speaker: Junhao Yin (Korea University)

bhabha veto in hie:stt:tau.pdf

104 Physics performance vs time since injection

Speaker: Petar Kevin Rados (HEPHY)

Perf_vs_TSI_1Dec2022.pdf

105 Trigger menu discussion after LS1 and beyond

Speaker: Taichiro Koga (BELLE (BELLE II Experiment))

Friday, 2 December

Joint Session: LS2 and Beyond 1

Zoom : https://us06web.zoom.us/j/82590498312?pwd=UkRzY0RnU2xOU0FHcWIwSjdneElydz09

Conveners: Satoru Yamada (BELLE (BELLE II Experiment)), Taichiro Koga (BELLE (BELLE II Experiment))

106 New technologies for high-speed readout

Speaker: Yun-Tsung Lai (Belle (SuperKEKB Experiment))

20221102_data_transmission.pdf

107 PXD readout upgrade

Speaker: Igor Konorov (BELLE (BELLE II Experiment))

PXD_readout_upgrade_Igor_20221202.pdf

108 CDC FEE upgrade

Speaker: Nanae Taniguchi (BELLE (BELLE II Experiment))

b2cdc_221202_nanae.pdf

109 TRG upgrade

Speaker: Taichiro Koga (BELLE (BELLE II Experiment))

koga_trg_ls2_2022_12_2.pdf

10:30 Break

Joint Session: LS2 and Beyond 2

Zoom : https://us06web.zoom.us/j/82590498312?pwd=UkRzY0RnU2xOU0FHcWIwSjdneElydz09

Conveners: Satoru Yamada (BELLE (BELLE II Experiment)), Taichiro Koga (BELLE (BELLE II Experiment))

110 DAQ for higher L1 rate + Triggerless DAQ

Speaker: Satoru Yamada (BELLE (BELLE II Experiment))

221201_HighRate_TriggerLess_Yamada.pdf

111 Detector requirements for higher rate/triggerless DAQ : PXD

Speaker: Bjoern Spruck (BELLE (BELLE II Experiment))

2022_12_02_PXD_Triggerless_2.pdf

background info: extended discussion about band-width in different scenarios

112 Detector requirements for higher rate/triggerless DAQ : SVD

Speaker: Katsuro Nakamura (KEK)

221202-SVDReadoutLimit_TRGDAQWS.pdf

113 Detector requirements for higher rate/triggerless DAQ : CDC

Speaker: Yu Nakazawa (BELLE (BELLE II Experiment))

20221202.pdf

114 Detector requirements for higher rate/triggerless DAQ : TOP

Speaker: Harsh Purwar (BELLE (BELLE II Experiment))

top_trgLessDAQ_Purwar.pdf

115 Detector requirements for higher rate/triggerless DAQ : ARICH

Speaker: Kenta Uno (BELLE (BELLE II Experiment))

ARICH_Kuno_20221202.pdf

116 Detector requirements for higher rate/triggerless DAQ : ECL

Speaker: Mikhail Remnev (BELLE (BELLE II Experiment))

2022.11.29_trgdaq_ecl_mikhail.remnev.pdf

117 Detector requirements for higher rate/triggerless DAQ : KLM

Speaker: Swagato Banerjee (University of Louisville (U.S.))

2022.12.02.KLM.highrate.triggerless_v3.pdf

118 Detector requirements for higher rate/triggerless DAQ : TRG

Speakers: Hideyuki Nakazawa (BELLE (BELLE II Experiment)), Taichiro Koga (BELLE (BELLE II Experiment))

b2gm221202_trghighrate.pdf

119 Discussion

120 Hardware Acceleration in HLT

Speaker: Qidong Zhou (BELLE (BELLE II Experiment))

TRGDAQ2022_QidongZhou_20221202.pdf

12:25 Lunch

Closing session: Closing

Zoom : https://us06web.zoom.us/j/82590498312?pwd=UkRzY0RnU2xOU0FHcWIwSjdneElydz09

Convener: Ryosuke Itoh (BELLE (BELLE II Experiment))

121 Summary of Trigger discussion

Speaker: Taichiro Koga (BELLE (BELLE II Experiment))

koga_trg_summary_2022_12_2.pdf

122 Summary of DAQ discussion

Speaker: Satoru Yamada (BELLE (BELLE II Experiment))

221202_DAQ_Summary_Yamada.pdf

123 Closing

Speakers: Kenkichi Miyabayashi (BELLE (BELLE II Experiment)), Ryosuke Itoh (BELLE (BELLE II Experiment))

closing.pdf