RiunionerefereesBelle2 15 Maggio2014 Introduzione ... · Belle ReconstrucZon’so=ware’...
Transcript of RiunionerefereesBelle2 15 Maggio2014 Introduzione ... · Belle ReconstrucZon’so=ware’...
Belle
Riunione referees Belle2 15 Maggio 2014
-‐ Introduzione
-‐ A:vità so=ware dei gruppi ELC-‐IT per Day1 -‐
-‐ R&D status per upgrade del forward calorimeter
C. Cecchi for the ECL-‐IT group
15/05/13 1
Belle
ECL of Belle experiment is a CsI(Tl) calorimeter. FWD is 1152 crystals + 960 BCKW of about 5x5 cm2 x 30 cm
Belle2 will use the same calorimeter for “Day1” and will upgrade FWD and BCKW 2019 The upgrade of the calorimeter is at the moment FWD and BCKW pure CsI crystals Read out:
Belle2 collaboraZon proposal photopentodes change mechanical structure, no redundancy We propose APD readout reuse mechanical structure (order of 1Meuro) + redundancy
For the BCKW no study at the moment, no groups involved in the effort
IntroducZon
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Belle
ReconstrucZon so=ware Electron idenZficaZon (G. De Nardo) Task force per la definizione della strubura generale del sodtware (PG + NA)
ECL CalibraZon Each crystal calibraZon by Bhabha and e+e-‐ -‐> gamma gamma Development of the code is in progress. Some parts have already been commibed and included in the so=ware (new matrix inversion compaZble with BelleII code is in place).
Discussion on Number of events needed for the calibraZon InteracZon with other detectors (tracking) Control plots + automaZc procedure to calibrate regularly the detector Info to be stored in the data base + ……. have been discussed in presentaZon at the compuZng/so=ware workshop by E. Manoni + other relevant people
DAY1 so=ware acZviZes
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Belle
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Schedule
R&D for choice of photodetector (APD or Photopentode) will be discussed in the B2GM in June
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a) From 0 to 8 b) From 1 to 8
a) 672 pure CsI + 480 CsI(Tl) b) 48 CsI(Tl) + 624 pure CsI + 480 CsI(Tl) c) 48(?) + 720 pure CsI + 384 CsI(Tl) (exclude 1st
layer from trigger and maintain same number of trigger cells)
c) From 1 to 9
Replacement of the rings: complete or parZal?
Theta ID
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R&D acZviZes in Italy LAAPD
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R&D LAAPD: control of the gain
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R&D LAAPD: signal a=er amplificaZon for the two APD’s and for the sum
Temperature of the run 19.8 ± 0.2°C
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R&D LAAPD: signal a=er shaping for the two APD’s and for the sum
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R&D LAAPD: shaper so=ware
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R&D acZviZes in Italy LAAPD temperature stability studies
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R&D LAAPD: calibrazione del sensore di temperatura
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R&D LAAPD: dipendenza del guadagno dalla temperatura
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R&D LAAPD: noise equivalente in funzione della temperatura
C)°Temperature (14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35
ENE
(MeV
)
0
0.5
1
1.5
2
2.5
3 LAAPD1LAAPD2LAAPD Sum
ENE (SHP) - Temperature Dependency
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R&D acZviZes in Italy APD Hamamatsu (5mmx5mm)
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R&D APD: gain
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R&D APD: noise e segnale all’uscita del CSP
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R&D APD: dipendenza dalla tensione di bias
Noise equivalente è circa un fabore due perggiore rispebo al caso dei LAAPD
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R&D acZviZes in Italy APD excelitas
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R&D excelitas: spebri di ampiezza due shaping diversi
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R&D excelitas: ampiezza degli APD e noise equivalente per due APD’s per cristallo
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R&D excelitas: test con 4 APD’s per cristallo
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R&D excelitas: ampiezza APD e noise equivalente per double sampling e dopo lo shaping lineare
Double sampling CSP level
Linear shaping
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R&D acZviZes in Italy 1” photopentodes 2/cristallo
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No Lead absorber
With lead absorber
R&D PP 2”: comparison with and wo absorber
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R&D PP 1”: raw energy, channel equalizaZon, S/N raZo
CorrelaZon of the two channels a=er correcZon
Signal/noise on ch1 = 49. Assuming a that muon delivers 30 MeV noise level is about 650 KeV
Signal to noise raZo on ch2 = 76 under the same assumpZon We esZate a noise level of about 400 KeV
No shaping has ever been applied to This analysis
Raw energy
S/N
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R&D PP 1”: S/N raZo channels combinaZon
Signal to noise raZo is 78.
We do not gain much from channels combinaZon.
It is maybe due to the huge difference between the 2 photopentodes
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R&D acZviZes in Italy uSOP (Service Oriented Plauorm for slow control)
Belle
• Cortex A8 uP @ 1GHz • Linux OS (Debian) • 2 GB Flash • 512 MB RAM • Designed as a
possible general plaYorm for Belle2 slow-‐controls
• Designed for easy manteinability
• 3U Eurocard form factor
• Derived-‐from and compa^ble-‐with BeagleBoneBlack open source project
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uSOP: REV B
USB (device)
Ethernet
USB (host) uSD
LEDs
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Belle
• Design of first version (Rev. B) completed • 5 PCBs produced and received • Wai^ng for components: – Two ICs in back-‐order: 16 weeks delivery ^me from RS, Digi-‐Key, Mouser, …
– Looking for alterna^ve suppliers (brokers, …) • Assembly completed possibly by end of June (condi^oned by component availability)
• Then tests, debug, troubleshoo^ng, … 30
uSOP: Project Status of the HW
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Belle
• Linux por^ng is available open-‐source (Debian) • Sohware for JTAG programming of Xilinx FPGA completed and tested
successfully • Sohware for ADC read-‐out via I2C in progress • Sohware for IPMI(*)-‐like features in progress
• Hot spots: – Integra^on in EPICS – Defini^on of high-‐level sohware architecture :
• push vs. pull • publish/subscribe • synch. vs. asynch • Network usage and role • web or stand-‐alone GUI
*Intelligent PlaYorm Management Interface
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uSOP: Project Status of the SW
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Belle
• In this revision, uSOP does not include peripherals. Instead, it supports protocols for remote data acquisi^on via field busses (I2C, SPI, JTAG, …)
• For temperature monitoring in Belle2, LTC2499 seems to be a perfect candidate: – 24-‐bit, ΣΔ architecture – 50/60 Hz line noise filter – 7.5 Hz sampling Rate – Direct Sensor Digi^zer – Direct Temperature Measurement – I2C interface
• uSOP can be directly interfaced with the DC1012A-‐A board available from Linear Tecnology for performance evalua^on
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uSOP: Temperature monitoring
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R&D acZviZes in Italy Test di qualifica di colle grassi o:ci + irraggiamenZ
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OpZcal characterizaZon of coupling materials Transmibance (long-‐trasv) and LY measurements of CsI
crystals
Dry box and Lumen spectrophotometer
R&D on wavelength shi=ers (CsI emission toward blue region) APD irradiaZon (gamma, neutrons)
25m2 dark room with air condi^oning built for CMS-‐ECAL R&D
Dry box for LY meas.
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R&D CALLIOPE: acZviZes for BelleII
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Belle
Transmi9ance curves normalized by the single-‐ quartz support spectrum
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BC630 grease
Epo-‐tek 301 Epo-‐tek 305
R&D CALLIOPE: materials before irradiaZon
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high radiaZon hardness at lower and higher thickness
Transmibance @ 315nm [a.u.]
Bef.irr. 3.2Gy 13.2Gy
0.82 0.81 0.80 Transmibance @ 315nm [a.u.]
0.80
0.79 …aAer the end of irradiaCon…
highly stable a=er irradiaZon
R&D CALLIOPE: BC630 a=er irradiaZon and stability
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modified by gamma radiaZon (up to 3.2Gy) influenced by the thickness very low transmibance (315nm)
Transmibance @ 315nm [a.u.]
Bef.irr. 3.2Gy
0.34 0.42
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Transmibance @ 315nm [a.u.]
0.43
0.38 …aAer the end of irradiaCon…
the worst behaviour a=er irradiaZon
R&D CALLIOPE: EPO-‐TEK 305 a=er irradiaZon and stability
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BC630 grease seems to present the best results:
-‐ higher transmibance @315 nm (before and aAer irradiaCon)
-‐ higher gamma irradiaZon resistance and stability
-‐ transmibance less dependent on the thickness viscous, so= (not mechanically stable but handly and easy removable)
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R&D CALLIOPE: summary
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Epo-‐tek 305 resin probably not suitable for Belle II applicaZons: -‐ transmibance @315 nm too low also for thin layer (parCal transparency in UV range) -‐ unstable under gamma irradiaZon and a=er the end of irr.; -‐ damaged even at low absorbed doses
Belle
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R&D acZviZes in Italy Piani futuri a breve termine
Belle-‐ Questa se:mana è in presa daZ 1 cristallo lebo da un lato con 4 APD excelitas dall’altro con 2 LAAPD
Le performance misurate fino ad oggi sono molto simili, questo confronto direbo dovrebbe aiutare nella scelta per la lebura della matrice per il TB
-‐ Matrice 16 cristalli a Mainz in Sebembre, le parZ di lavoro che possono avanzare indipendentemente da quale APD sarà montato stanno procedendo -‐ Un amplificatore diverso da quello uZlizzato per i test è stato svluppato a RM3, la misura dei LAAPD uZlizzando questo preamp dà un noise equivalente di circa un fabore 2 peggiore del CREMAT studi sono in corso per migliorare il disegno ora che abbiamo una prima misura IL DISEGNO DEVE ESSERE OTTIMIZZATO sul fotorivelatore! -‐ Irraggiamento (gamma + neutroni) da fare alla Casaccia per tu: e due I Zpi di APD (alcuni sono in corso), + studi di QE per diverse lunghezze d’onda di luce -‐ studio del gain dei LAAPD in funzione della lunghezza d’onda in corso a PG -‐ test di LAAPD con WLS 420nm dove QE è max -‐ Task force per l’upgrade di ECL FWD sta scrivendo il proposal dovrebbe esserci una prima versione per il B2GM
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R&D ECL FWD: futuro prossimo
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R&D ECL FWD: test beam
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AcquisZ (fa: e/o coperZ) + richieste ECL -‐ 10 APD excelitas ordinaZ a LNF per test + qualificazione -‐ 10 LAAPD ordinaZ per test + qualificazione -‐ LED di diverse lunghezza d’onda acquistaZ per studiare gain -‐ cristalli per matrice -‐ meccanica in costruzione
-‐ WLS per fare test con LAAPD -‐ fotorivelatori + FE da scegliere e acquistare x matrice
-‐ DAQ nel caso di scelta di excelitas manca 1 modulo V1720
500 euro PIN calibra^ per misure Quantum Efficiency su APD irraggia^ 500 euro step motor controllato per automazione misure di Quantum Efficiency su APD irraggia^ 1000 euro riparazione monocromatore (inventariato iNFN) per misure di trasmiranza su cristalli di grandi dimensioni 1500 euro materiale vario per mantenimento atmosfera secca per CsI puro durante misure, irraggiamento, stoccaggio (bombole, glove bags, raccordi e flussometri gas, sali essiccan^ ecc.) 500 euro lampade sperrofotometro per misure trasmiranza su CsI
OK OK OK OK OK
OK OK
NO
4Keuro
Belle
Belle 2 ECL FWD 1152 cristalli 5.5x5.5x30 cm^3 = 907.5 cm^3 ≈1000 cm^3/cristallo Costo CsI puro circa 4.5$/cc 4.5K$/cristallo Costo totale FWD (CRISTALLI ) 5.2M$ = 3.9Meuro
APD-‐UV: 500 euro/pcs (2xcrystal) 1152 Keuro
FE: 70 euro/ch 161 Keuro
PTD: 1152x2/32 ch 144 keuro (72 moduli)
uSOP: 1152x2/160 ch 60 keuro (15 schede)
TOTALE ECL FWD (con ipotesi di FE da noi proposto per la lebura degli APD-‐UV slow control presentato alla collaborazione) il tubo si integra con il sistema di DAQ esistente 5.4 Meuro 09/05/13 43
Belle
Proposta di 3 moduli (19% di ECL FWD) compleZ da assemblare in ECL + commissioning a KEK
Costo di 3 moduli :
Cristalli 670 850 Keuro (ricevuta offerta + dimensione cristalli) APD-‐UV 219 Keuro FE 31 Keuro PTD 144 Keuro uSOP 60 Keuro
TOT 1304 Keuro
Proposta che sZamo coordinando con le altre isZtuzioni di ECL Belle2
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Abenzione: PTD e uSOP (slow control) è per l’intero detector ECL