ALICE-J status and O2 plan
Tatsuya Chujo
University of Tsukuba(on behave of ALICE-J)
ALICE-Japan participation in O2 project
May 23, 2016
Hiroshima U. Tokyo office, Tamachi, Tokyo

ALICE-J group and members (1)Scientific Staff: 10, Technical staff: 1, Post-doc: 1
PhD: 10, Master: 12
Total: 34
CNS-Tokyo:•

Staff (1): T. Gunji•

Post-doc (1), Y. Watanabe•

PhD (4), Master (0)•Physics Woking Group: GA, DQ, HF, CF, LF
Univ. of Tsukuba (* Tsukuba Tech):•Staff (5): Y. Miake, S. Esumi, T. Chujo, O. Busch, M. Inaba*•Technical staff (1): S. Kato•

PhD (3), Master (4)•Physics Woking Group; JE, CF2

ALICE-J group and members (2)Hiroshima U.:•Staff (2): T. Sugitate, K. Shigaki•

PhD (3), Master (5)•Physics Woking Group: GA, DQ
Nagasaki Institute of Applied Science (NiSA):•

Staff (2): K. Oyama, H. Hamagaki•

PhD (0), Master (3)•Physics Woking Group: -★ Future:- Nara Women’s University• considering to join ALICE as a full member (Maya Shimomura)- JAEA (Japan Atomic Energy Agency)• considering to join ALICE as an associate member (Hiroyuki Sako)

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Main objectives (personal view)▶ How we can contribute to O2 in the next 5 years (2016 -2020) before Run-3 starts?
・Coherence
・How we contribute strongly and efficiently
・New collaboration related to the future projects in Japan- ALICE, GSI-FAIR, J-PARC

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Current activities on operation/ upgrade (1)
CNS-Tokyo:• GEM-TPC- Building X-ray and test systems for the full evaluation (GEM-SAMPA-CRU-GPU)- Learning GPU and FairMQ for TPC online tracking / distortion correction /vertexing• TPC-RCU2- embedding Linux, bootstrap applications, remote firmware upgrade, detectorcontrol system

Univ. of Tsukuba:• EMCal/DCal (L1 jet/gamma FW development, monitoring, calibration)• FoCal upgrade• ALICE Grid Tire 2 center in Tsukuba (under construction)

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Current activities on operation/ upgrade (2)Hiroshima U.:• PHOS (operation and calibration)• ALICE Grid Tire 2 center in Hiroshima• Muon Forward Tracker (MFT) upgrade (DCS, ALPIDE chip characterization)• (FoCal, integration part)
Nagasaki Institute of Applied Science (NiSA):• TPC-CRU R&D (general coordinator)• (FoCal, readout part)

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The ALICE O2 Hardware Architecture
Nagasaki

CNS-Tokyo

JAEA w/ Tsukuba?

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Detector read-out; O2 interfaces

CNS-Tokyo
Nagasaki8

Roles of Tiers in Run-3
Reconstruction
Calibration
Archiving
Analysis

DAQ
Reconstruction
Calibration

Nagasaki
CNS-Tokyo
JAEA w/Tsukuba ?

Hiroshima
Tsukuba
Simulation

Analysis9

Ongoing and possible contributions to O2
CNS-Tokyo:• Online calibration or tracking by GPU• Distribution middleware (FairMQ, nanomsg, etc)
Univ. of Tsukuba:• ALICE Tire 2 center in Tsukuba w/ SINET-5• Possible contribution to data compression part (EPN) in O2 with JAEA
(one master student)• possibility to use HPC in Tsukuba U. CC?
Hiroshima Univ.:• ALICE Tire 2 center in Hiroshima w/ SINET-5
Nagasaki Institute of Applied Science (NiSA):• CRU in O2
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Discussion items
1) O2 task distributions and organization
2) Which parts/ tasks are missing most, or luck of manpower?
3) Role of Tire1/2 and AF
4) AF candidates5) detail of CR0/1 status and plan6) status of participants of ALICE members in O2
7) O2 near term plan
8) O2 long term plan
9) Budget10) Which contributions are expected from Japan?
11) Status and detailed plan of EPN and FPL activities, missingparts, manpower, possible contributions from ALICE-J

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Thank you!

12Grants in Japan on ALICE (2)* Some new proposals (FY2016-) are waiting for approval.
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Grants in Japan on ALICE (2)* Submitted the new proposal from ALICE-J (including O2), “Program for Advancing Strategic International
Networks to Accelerate the Circulation of Talented Researchers”, (starting from October 2016 to March
2019, 2.5 years), on May 2016.

14Hardware O2 facility

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O2 architecture
O2

Data of all interactions shipped from detector
to online farm in trigger-less continuous mode
HI	  run	  1.1	  TByte/s

Data volume reduction by cluster finder
No event discarded
Average factor 2.2(factor 2.5 for the TPC data)
500	  GByte/s

Data volume reduction by online calib. and reco
All the events go to data storage
Average factor 5.5 (factor 8 for the TPC data)

Tiers 2Tire 020	  GByte/s

Tiers 1 and AF

90	  GByte/s

Compressed Timeframes (CTF)

Data Storage: 1 year of compressed data• Bandwidth: Write 90 GB/s Read 90 GB/s
• Capacity: 60 PB

Asynchronous event reconstruction with final calib(delay of few hours)

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