2nd ALICE BP Meeting 2015

G.G. Barnaföldi et al, Budapest, 10th August 2015

19.02.2010. MTA KFKI RMKI

08/10/15 G.G. Barnaföldi, Wigner RCP, HAS 2

Directions for 2015

Financing OTKA NK106119 will run out by next year (CERN DAQ, analysis, GRID) Less resources: minimal travel, salaries (1+0,5+0,5), 0 for equipments Varga D. Lendület (Detector R&D) Other resources are weak, but... – please apply for e.g. Wigner – KIS INFRA (6 MHUF) – Clean Room development (1-2 MHUF ?) – GRID (10 MHUF) ALICE Old directions: HMPID (analysis), DAQ, TPC (R&D), New directions: PID analysis, TPC (analysis, R&D), DAQ R&D

GROUPS (Weak point is still the manpower...)DAQ [E Dávid, J. Imrek, G. Kiss, T. Kiss, Tuan M. Nguyen] TPC R&D [D Varga, G Hamar, Gy Bencédi, G. Kiss, Gy. Bencze, L. Boldizsár]HMPID [L. Oláh, S. Pochybová, E. Futó]GRID T2 [SzM. Harangozó, G. Bíró, E Futó, P. Pósfay, A. Lowe, GGB]HF [R Vértesi]

08/10/15 G.G. Barnaföldi, Wigner RCP, HAS 3

The manpower:PhD (9)

– S. Pochybová (Quark/Gluon analysis, HMPID analysis, HMPID shifts)– Gy. Bencédi, (TPC/HMPID PID analysis, UNAM Mexico)– L. Oláh (HMPID ageinganalysis)– G. Hamar (ALICE/REGARD, TPC) postPhD– G. Kiss (REGARD, DAQ)– Sz.M. Harangozó (GRID Management)– L. Boldizsár (TPC, HMPID shifts)– G. Bíró (GRID management)– P. Pósfay (GRID management)

MSc/BSc (2)– M. Tuan Nguyen (DAQ)– Zs. Szendi (TPC) ?– Sz. Karsai

PostDoc/Staff (2+4+4)– A. Lowe (HMPID & Analysis)– D. Varga (REGARD, TPC)– R. Vértesi (HF Jets)– G. Volpe (HMPID, PID until – 2015.12.31)– E. Futó (Shifts)– T. Tölyhi– J. Imrek– E. Dávid

08/10/15 G.G. Barnaföldi, Wigner RCP, HAS 4

Directions for 2015

Financing OTKA NK106119 will run out by next year (CERN DAQ, analysis, GRID) Less resources: 2 M for travel, salaries, 0,5M for equipments Varga D. Lendület (Detector R&D) Other resources are weak, but... – please apply for e.g. Wigner – KIS INFRA (6MHUF) – Clean Room development (1-2 MHUF) – GRID ALICE Old directions: HMPID (analysis), DAQ, TPC (R&D), New directions: PID analysis, TPC (analysis, R&D), DAQ R&D, HF

GROUPS (Weak point is the manpower..... still)DAQ [E Dávid, J. Imrek, G. Kiss, T. Kiss, Tuan M. Nguen] TPC R&D [D Varga, G Hamar, Gy Bencédi, G. Kiss, Gy. Bencze, L. Boldizsár]HMPID [L. Oláh, S. Pochybová, E. Futó]GRID T2 [SzM. Harangozó, G. Bíró, E Futó, P. Pósfay, A. Lowe, GGB]HF [R Vértesi]

08/10/15 G.G. Barnaföldi, Wigner RCP, HAS 5

Planned tasks and PAPERsPhD & PostDoc (see more in next presentations)● S. Pochybová: ALICE PID Paper, AN (NOW), PhD● Gy. Bencédi: correlation paper, HpT4LHC, Fiz Szemle● G. Hamar: (see presentation)● L. Oláh: Muontomograph, AN/HMPID Performance Paper● G. Kiss: DAQ papers● A. Lowe: AN ?● Sz. Karsai: ALICE Bochure and Cartoon (CERN/ alice.wigner.mta.hu)

OTHER● G. Biró / Nagy Máté Ferenc (MC@GPU)● G. Kalmár FF paper● D. Varga & G. Hamar (TPC GEM test method)

08/10/15 G.G. Barnaföldi, Wigner RCP, HAS 6

Planned TripsConferences● Quark Matter 2015 (BGy, PL, PG, BGG) – other resources● High-pT For the LHC, BNL, USA (???) – OTKA?

● Need to pick up the line: Zagreb Budapest Meetup● Zimányi Winter School 2015 (All)● Data Science @ LHC (A. Lowe)● GRIDKa School, Karlsruhe (B.G ?)

Planned trips● Beam Test with Bergen group (2015.12/2016.01)● UNAM-CERN E-PLANet (BGy, Mexico)● Wuhan (HSzM, PG, PL, BGG)

08/10/15 G.G. Barnaföldi, Wigner RCP, HAS 7

Visibility Seminars● New Students, New members:

– Wigner Seminar– Eötvös Univeristy

● Close-to-PhD, – Seminar at Eötvös University

PR activities● T. Kiss, E. Dávid, T. Tölyi: DAQ Labor has been established● BGG: Atomcsill (2. féléb● BGG et al: November Tudomány napja● ALICE TPC PR..

08/10/15 G.G. Barnaföldi, Wigner RCP, HAS 8

Summaries by the Groups....

08/10/15 G.G. Barnaföldi, Wigner RCP, HAS 9

DAQ Group

Recent events and activities (2015)

Group expansion:• József Imrek - a new colleague joined our group as a designing engineer

in April• Tuan Máté Nguyen - he has been accepted as a technical student in CERN ALICE DAQ

Group from September

Recent purchases/investments:• LHCb MiniDAQ – StratixV FPGA dev kit for ALICE CRU firmware development

including 10 GbE NIC and optical break-out cables• New 3-channel power supply unit • Schroff MicroTCA crate for operating Advanced Mezzanine Cards (AMC)• 2 new desktop PC for FPGA firmware development

Preparing for the renovation of the laboratory:• Scrapping, packing•

Recent events and activities (2015)

Group activity related to ALICE LS1:• ALICE TPC Readout Control Unit (RCU2) upgrade - FPGA firmware development

• SGMII Ethernet Link firmware modules development (E. Dávid)

Group activity related to ALICE LS2:• ALICE Common Readout Unit (CRU) Development

• Project management, coordination (T. Kiss)• Firmware development coordination (E. Dávid)• Parts of firmware development (E. David)• ALICE FLP nodes I/O and memory performance tests (J. Imrek)•

• Regular CRU weekly meetings (every Wednesday @ 10:30) (T. Kiss, E. Dávid)• https://indico.cern.ch/category/6355/•

• Organizing of 1st CRU Workshop at CERN

(1-2 July, T. Kiss, E. Dávid, J. Imrek, T. M. Nguyen)• https://indico.cern.ch/event/395605/

Further plans (2015)

Ongoing developments:• ALICE CRU project management (T. Kiss), firmware development coordination

(E. Dávid), and firmware development (E. David)• ALICE FLP nodes I/O and memory performance tests (J. Imrek)• T. M. Nguyen will join to the CRU development in CERN from September

developing linux drivers for the new CRU cards

Travel plans (from Wigner / OTKA budget): • September/October, CRU Meetings (T. Kiss, E. Dávid)• November/December, ALICE week/mini-week, 2nd CRU Workshop (T. Kiss, E. Dávid, J.

Imrek)• 5-6 filghts to Geneva in total. Flights to be booked in August, to reduce costs!

Planned purchases (from CRU development budget at CERN): • Two Altera Arria10 FPGA Engineering Sample v2 for the PCIe40 prototypes• 1 or 2 Altera Arria10 FPGA Development Board for CRU prototype development• CERN Versatile Link Demo Board (VLDB) for GBT link development

08/10/15 G.G. Barnaföldi, Wigner RCP, HAS 13

ALICE Tier 2 & Local CAF

Szilveszter Harangozó – Research progress

HIJING v3.0• Core software dev.

• Pythia8• XML libraries• GSL integration• Function validation

• Model development

• Shadowing upgrade• Jet quenching• QCD cascade model

kTpQCD v2.1• Calculation for LHC energies

• pp, pA charged π,p,K spectra at 7 and 5.02 TeV (Gyu)

• PHENIX and ALICE energy scan for 22.4, 62.4, 200, 2760 GeV

• Program upgrades HIJING

ALICE Tier2 and CAF

• Tier2massive storage upgrade

136TB → 316TB

CPU stack upgrade

6.5k → 13k HS06

decommission of grid130

• CAFalice09 machine

alice06, 08 rebooted

• MOVING TO SEPARATE RACK IN AUGUST

Decommissioned machince may be placed to CAF

08/10/15 G.G. Barnaföldi, Wigner RCP, HAS 16

Bíró Gábor

AchievementsLanguage exam, MScTalks: Zimányi 2014, Statistical Physics Day 2015, CiiT 2015 (Bitola, Macedonia), GPU Day 2015

Papers: 2015 J. Phys.: Conf. Ser. 612 012048, CiiT Proceedings, others in progress

ActivitiesAnalysing identified hadron spectra with Tsallis – Pareto distributions in the soft+hard approachALICE Grid Tier 2

PlansStart a successful PhD :)Travel: September 2015 – Karlsruhe, GridKa School (80kHUF)

08/10/15 G.G. Barnaföldi, Wigner RCP, HAS 17

REGARD & TPC R&D

08/10/15 G.G. Barnaföldi, Wigner RCP, HAS 18

G. Hamar : Short Summary on Works

and their Connection to the ALICE-Budapest Group

PhD: done :)  [formal paper expected in winter]

Postdoc application:  INFN Trieste (Italy) : accepted, start: 18. Aug. 2015.Topic: Micropattern detectors, COMPASS

Do not want to stop the activities in the REGARD­, and ALICE­BP groups.

ALICE­Budapest Meeging, 10. Aug. 2015. Budapest

08/10/15 G.G. Barnaföldi, Wigner RCP, HAS 19

Recent work topics:Leopard project (AIDA­2020), GEM QA, MuonTomography, MWPC, PET, ...[GEM QA is for the ALICE GEM TPC Upgrade]

Conferencies:Muographers2015;   RD51CM;    Erice ISSPComing: MPGD2015 (October)

Papers:Two Proceedings of TIPP2014 on CCC, and LeopardIn preparation: TCPD paper, Trieste­Leopard paper[CCC and TCPD were developed for the VHMPID]

RD51 Collaboration Meeting, 20/03/2015 20

GEM gain mapping for QA purposesin framework of ALICE TPC UG

Dezső Varga for the Budapest group

● GEM gain maps, 4mm by 4mm pixel size

(4 min. time for 10cm by 10cm)● Consistency checks (rotating, flipping)● Maps at various gains: relation / predictivity● Maps in different gases: relation / predictivity● Hot spots?● Scheme as a QA device

RD51 Collaboration Meeting, 20/03/2015 21

Prelude: demonstration of hole geometry and GEM gain relation

● Recent paper by the Helsinki group, demonstrating gain predictability by hole geometry!

T. Hildén, E. Brücken et al, Optical quality assurance of GEM foils

RD51 Collaboration Meeting, 20/03/2015 22

GEM gain mapping● As a “Quality Assurance” device:

– gain map for detector performance assessment

– rejecting foils with excessive non-uniformity

– cross-check the prediction from optical scanning

● As an “R&D” issue:

– how to obtain the best prediction of gain map from hole geometries

– how to relate different GEM voltages, working gases, transfer/drift fields etc.

RD51 Collaboration Meeting, 20/03/2015 23

GEM from the Helsinki group– we are very grateful for the collaboration

GEMcontacts

RD51 Collaboration Meeting, 20/03/2015 24

Chamber outline: GEM + high gain MWPC

Guard rim for well defined geometry and field

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Detector assembly● MWPC bare with GEM fixing screws

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Installing GEM

GEMcontacts

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Installing cathode

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The complete setup

● Source 40cm above

(Fe55)● DAQ board

● ADC (12 bit)

● R-Pi computer

(DAQ developed

within RD51 CFP)

GEMcontacts

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Check GEM / detector / readout orientation

GEMcontacts

RD51 Collaboration Meeting, 20/03/2015 30

MWPC uniformity (GEM off)

● Well equalized gain of the CCC – good reference!

GEMcontacts

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GEM gain map at gain of 6

UGEM=300V USW=1000V

GEMcontacts

Re-done after 15 min,ratio

RD51 Collaboration Meeting, 20/03/2015 32

GEM gain map at gain of 30● High gain similar map as lower gain, non-

uniformity increased

UGEM=400V USW=800VRe-done after 15 min,

ratio

RD51 Collaboration Meeting, 20/03/2015 33

Relation between the different voltages: power law (linear)

● Non-uniformity goes with GEM gain slope! Predictable at any voltage

(Done in flipped configuration)

Gain at 300V

Gainat

400V

Gain ratio, 400V vs 300V

RD51 Collaboration Meeting, 20/03/2015 34

Rotation exercise (shown in detector coordinate system)

● 300V GEM voltage

● 400V GEM voltage

(nicely rotates)

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Comparing with non-rotated

● Apparent compatibility, needs to be quantifiedORIGINAL ROTATED

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Flipping (upside down) exercise (shown in detector coordinate system)

● 300V GEM voltage

● 400V GEM voltage

(nicely fips left/right)

RD51 Collaboration Meeting, 20/03/2015 37

Comparing with non-flipped

● Apparent compatibility, needs to be quantifiedORIGINAL FLIPPED

RD51 Collaboration Meeting, 20/03/2015 38

Going to TPC gas: Ne:CO2:N2 90:10:5

● 300V GEM voltage

● 400V GEM voltage

(similar as in ArCO2)

RD51 Collaboration Meeting, 20/03/2015 39

GEM voltage dependence again established

● Again correlated, different slope

Predictable at any voltage Gain map ratio 400V vs 300V

Gain at 300V

Gainat

400V

RD51 Collaboration Meeting, 20/03/2015 40

Difference between different gases: power law / linear

● Well established correlation at 300V and 400V

Gain map ratio Correlation Gain map ratio Correlation

300V 400V

Predictable between ArCO2 and NeCO2N2 !Gain in ArCO2 Gain in ArCO2

Gai

n in

NeC

O2N

2

Gai

n in

NeC

O2N

2

RD51 Collaboration Meeting, 20/03/2015 41

GEM scanning observables

● TG26 maps from Timo and Erik (thanks!)

OuterTOP

Outer BOTTOM

Misalignment

Inner

RD51 Collaboration Meeting, 20/03/2015 42

Comparing to present version of gain prediction (Helsinki results)

Prediction prescription is now under work and being improvedby Helsinki colleagues!

PREDICTION MEASURED

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As a device: key parameterswith the existing setup

● Now 4kHz data taking: 4min. for 1M events, that is: 1 hour for IROC (50cm) size

● Point-by-point statistical error of 0.3%● Above 90% “good” event efficiency

RD51 Collaboration Meeting, 20/03/2015 44

Next steps towards real size:OROC and IROC foils for the ALICE TPC

● Step 1: “50cm” version, should match an IROC

● Step 2: “OROC” version, matched with transportable GEM-s of full size

RD51 Collaboration Meeting, 20/03/2015 45

50cm version: based on existing design, existing components

● Will it work: YES, part of an existing cosmic detector showing 99% efficiency and 4mm position sensitivity

● Key details, such as GEM installation, gas box integrity, top cover is to be clarified

RD51 Collaboration Meeting, 20/03/2015 46

Can we find hot spots?

● Strategy:

High GEM voltage/gain (e.g. 420V, 50)

Go with SW from 750V to 950V (!)

No source (only cosmics)

● Sensitivity to equivalent of a few electrons (to be checked). Local corona discharges should appear as low signal counts

RD51 Collaboration Meeting, 20/03/2015 47

No source, high signal (cosmic) map

● Uniform cosmic, local structures

UGEM=400VUSW =950V

POSITION MAP

Signal region: 600 - 2000

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No source, low signal region

● Local “hot spots” clearly appear

UGEM=400VUSW =950V

POSITION MAP

Signal region: 200 – 400 10 – 20e

RD51 Collaboration Meeting, 20/03/2015 49

Higher GEM voltage

● Hot spots persist (note 5 times data statistics!)

UGEM=420VUSW =950V

POSITION MAP

30e

Signal region: 200 – 400 7 – 14 e

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Hot spot appearance in rotated configuration

● Some (?) of the hot spots follow as expectedORIGINAL ROTATED

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Observations

● Hot spots (few electron signals creating local noise at few Hz) clearly observable

● Does it have implication on QA:

can such a hot spot trigger sparking?

can one characterize GEM-s by “appearance voltage” of hot spots?

may identified hot spots be correlated by optical?

RD51 Collaboration Meeting, 20/03/2015 52

Conclusions● Detector proposed for fast GEM gain mapping● Rotation, flipping exercise: detector

performance OK● Voltage dependence:

seems predictable with power law / linear● Gas filling ArCO2 vs NeCO2N2 dependence:

seems predictable with power law / linear● Full size versions for ALICE IROC/OROC foils

are being designed as a QA device

08/10/15 G.G. Barnaföldi, Wigner RCP, HAS 53

ANALYSIS GROUP

08/10/15 G.G. Barnaföldi, Wigner RCP, HAS 54

A two-slide summary of activities and plans

Róbert VértesiALICE-Budapest meeting

08-10-2015

08/10/15 G.G. Barnaföldi, Wigner RCP, HAS 55

Activities @ RHIC• PHENIX – Debrecen University / Wigner RCP, Budapest

– Calorimetry, neutral pions and direct photons– Femtoscopy: pion simulations– In-medium meson modification via femtoscopy

• STAR - Nuclear Physics Institute, Prague/Řež1. Bulk and Correlations PWG– Freeze-out dynamics via kaon femtoscopy in 200 GeV Au+Au

• SQM2013 (RV for STAR), Nucl. Phys. A 910, 331 (2013) • PAs: P. Chaloupka, P. Chung, R. Lednický, M. Šumbera, R.V.

Published in Phys. Rev. C 88, 034906 (2013)

2. Work in the Heavy Flavor PWG• Heavy Flavor production in STAR, ICHEP 2015 (Accepted in NUPHBP)

– Upsilons production in 193 GeV U+U collisions • Paper in progress, PA: R.V.• Presented on PANIC2014, Desy Conf. Proc.; and HP2015

08/10/15 G.G. Barnaföldi, Wigner RCP, HAS 56

Plans• @ LHC/ALICE

– Get to know the system (just got the CERN account)

– Get involved in PWG-HF activities → Workgroup?• HFE : Use knowledge for Calorimetry and open HF;

not very novel but need manpower for quick results• HFCJ : Expertise of the Bp (and NPI) group on jets;

way less explored field

– Plan to go to CERN for the ALICE week

• @ RHIC/STAR

– Hard Probes proceedings, deadline 18th September

– Finish the paper (current status: accepted by PWG, GPC being formed)

– Wish for the future: show final result on a conference

08/10/15 G.G. Barnaföldi, Wigner RCP, HAS 57

Sona Pochybova

● Activities:● Particle ratios in jet and bulk● Contribution with a cross-check to statistical identification with TOF● Paper in discussion● HPT 2014: Proceedings:arXiv:1504.01918 [hep-ex]

● Plans● Finish PhD● Possible travel:

– January 2016 – CERN, on-call HMPID

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● Paper (expected to be on arxiv before QM 15')● Multiplicity dependence of pion, kaon and proton production at large

transverse momentum in p-Pb collisions at sqrt(s_{NN}) = 5.02 TeVhttps://aliceinfo.cern.ch/ArtSubmission/node/1154

● Upcoming conference● QM 15'

● Contribution: ??? maybe poster (on 13TeV) – not 100%(most of the submitted abstracts in PWGLF were downgraded to poster presentation)

● Thesis● Conclude in 2016

Gyula Bencédi

08/10/15 G.G. Barnaföldi, Wigner RCP, HAS 59

A. Lowe: ALICE activities:Machine learning for particle physics● Devise prototype quark/gluon jet tagger using machine learning● Data-driven variable selection for model building

● Automated methods for searching “feature space” for new discriminants● Found new discriminant variables for quark/gluon tagging

● First analysis of this type performed in R (instead of ROOT)● Proof of concept demonstration that R can be used for fast prototyping

of HEP analysis● Collaboration with SZTAKI Data Mining and Search Group, HAS

● András Benczúr (head of department) and students● Joint research project to co-investigate machine learning for q/g tagging● Permission granted by ALICE Management to share MC data

● More information can be found on these slides

08/10/15 G.G. Barnaföldi, Wigner RCP, HAS 60

ALICE activities:paper plans

● Data-driven feature selection for quark/gluon jet tagging at ALICE● Could be a single paper, but this might be a topic best not removed from

the context of building a jet tagger (danger: selection bias!)

● Computer-vision inspired discriminants for quark/gluon jet tagging● Preliminary results from feature selection suggest that a family of new

discriminants (Hu image moments) could be at least as good or better than those already proposed for quark/gluon jet discrimination

● Prototype quark/gluon jet tagger for ALICE● Still working on improving performance● Primary bottleneck: lack of computing muscle● Need more CPU cores & RAM – cloud computing ($) or local resources?

● Joint paper with András Benczúr's group?● Need to discuss with ALICE how non-members can be attributed credit

08/10/15 G.G. Barnaföldi, Wigner RCP, HAS 61

Other activities

● Outreach● "Machine learning for particle physics using R", Budapest R Users

Group Meetup, BME, 18 February 2015● "Big Fast Data in High-Energy Particle Physics", Budapest Data

Forum, Hotel Mercure Buda, 3 June 2015– Same day as start of LHC Run 2! – Talk evaluation: 4.22 out of 5 (top speaker score was 4.75)

● Co-organisation of Data Science @ LHC2015 workshop at CERN, 9-13 November● Workshop to help foster long-term connections between the data

science and particle physics communities● Will be attending● Registration now open!

10 August 2015 Andrew Lowe, ALICE group meeting 62