PANDA Forward Spectrometer Calorimeter Shashlyk Status PANDA LV

PANDA Forward Spectrometer Calorimeter (Shashlyk) Status PANDA LV Collaboration Meeting Nov 30 – Dec 4 2015 Vienna, Austria Dmitry Morozov, IHEP (Protvino)

Outline FSC Overview TDR status Readout electronics Software Contract preparation status Production and performance of prototypes Test stand facility at IHEP using cosmics Schedule Resources Conclusions LV PCM - Vienna, Nov 30 - Dec 4 Dmitry Morozov (IHEP, Protvino) 2

FSC Overview Sizes are determined by a position at ~8 meters from the IP, opening in the Forward EMC Endcap (covers ~0. 7% of solid angle) Depth by the space between Forward TOF and forward Muon Range system LV PCM - Vienna, Nov 30 - Dec 4 Dmitry Morozov (IHEP, Protvino) 3

FSC Requirements Property Value Energy resolution (σE/E) (2 -3)%/√E(Ge. V) Photons energy threshold (Ethresh) 10 Me. V (20 Me. V tolerable) Single cell energy threshold (E 1) 3 Me. V Noise, energy equivalent (σEnoise) 1 Me. V Angular coverage 00 – 50 Energy range 10 Me. V – 15 Ge. V Spatial resolution 3. 5 mm Load per cell 1 MHz* Radiation hardness, maximum integrated doze 10 k. Gy* * Based on luminosity 2 x 1032 cm-1 s-1 LV PCM - Vienna, Nov 30 - Dec 4 Dmitry Morozov (IHEP, Protvino) 4

FSC Design Sizes: ~3. 6 m x 2. 2 m Active zone: 3 m x 1. 5 m (27 x 14 modules, 54 x 28 cells, 1476 channels) Beam pipe zone: 3 x 3 modules 380 layers of 0. 3 mm lead and 1. 5 mm scintillator, total length 680 mm Transverse size 55 x 55 mm 2 Light collection: 36 fibers Y 11 (BCF 91 A), 1. 0 mm PMT as a photodetector Quartz optical fiber for each cell for a precise PMT gain monitoring LED for each module as a light monitoring system LV PCM - Vienna, Nov 30 - Dec 4 Dmitry Morozov (IHEP, Protvino) 5

TDR Status Presented to Collaboration: March 2015 Discussion inside Collaboration: March – June 2015 Submitted to FAIR Expert Committee Experiments: June 2015 No questions/comments have been received from ECE up to now LV PCM - Vienna, Nov 30 - Dec 4 Dmitry Morozov (IHEP, Protvino) 6

Readout Electronics Similar to the target EMC readout the FSC readout chain contains digitizer, data concentrator and the Compute Node Digitizer processes data from the SADC (base line calculation, hit detection, feature extraction, pule up detection) SADC design is under development by Uppsala group 14 bit ADC, cover wide range from 3 Me. V to 12 Ge. V signals: single range is enough to cover the whole energy range – proved “at the table”, still needs to be double checked at the test beam We prepare the test setup with shashlyk prototype and 16 -channel SADC prototype from Pawel Marcinievsky Data concentrator collects data from several digitizers, pre-process data and provides connection to the PANDA time distribution system LV PCM - Vienna, Nov 30 - Dec 4 Dmitry Morozov (IHEP, Protvino) 7

Software New FSC geometry since Panda. Root revision 27641 Fixed many illegal geometry overlaps inside FSC volumes itself and with the beam pipe Checked with different versions of beampipe (201308, 201407) PID Bayesian algorithm The probability map (variations of p, E/p, Lateral moment, Z moments for 10 particle species) histograms Bayes. EMC. root was calculated by Ronald Kunne with rev. 14213 (Jan 2012) at kinematical region: 0. 2 Ge. V/c < p < 10 Ge. V/c, 50 < θ < 1400 We simulated analyzed 107 events with extended region to cover FSC 0. 1 Ge. V/c < p < 10 Ge. V/c, 00 < θ < 1400 Ø Revison 27833 used New Bayes. EMC. root is ready and can be incorporated to Panda. Root (after the final check by Ronald) Time Based simulation Pile-Up simulations (Modified waveforms) → planned (beg. of 2016) Reco using time information → planned (beg of 2016) Update geometry with passive elements → planned for 2016 LV PCM - Vienna, Nov 30 - Dec 4 Dmitry Morozov (IHEP, Protvino) 8

Contract preparation status TDR submitted to ECE on June 17, 2015 Pavel Semenov is preparing the Technical Specifications No problems since all the technologies are at hands at IHEP (Protvino) We expect positive decision of ECE in July 2016 After decision: Iterative process to reconcile the Technical Specs between TC and IHEP Discussion of the schedule of the production readiness prototype study and mass production modules delivery IHEP group has experience with FAIR contracts (EMC mechanical structure contract) The goal – to have the Contract ready to be signed by the fall of 2016 LV PCM - Vienna, Nov 30 - Dec 4 Dmitry Morozov (IHEP, Protvino) 9

Production of prototypes Type-1 KOPIO mold was used to produce 110 x 110 mm 2 tiles, Bicron BCF 91 A fibers, Tyvek wrapping around the module, four fixing pins per tile (correct spacing between plastic surface and lead for the full internal reflection), no Tyvek between scintillator and lead, fiber loop radius is 28 mm Type-2 KOPIO size tiles were milled in four quadratic parts (55 x 55 mm 2), Bicron BCF 91 A fibers, 1 fixing pin per tile (incorrect spacing between plastic surface and lead), painted side faces of the tile, no Tyvek between scintillator and lead, fiber loop radius is 14 mm Type-3 55 x 55 mm 2 scintillator tiles were produced with new mold, Kuraray Y 11 fibers, four fixing pins per tile, painted side faces of the tile, sheets of Tyvek between scintillator and lead, fiber loop radius is ~14 mm Type-4 55 x 55 mm 2 - same as Type-3 but NO Tyvek between scintillator and lead. Produced recently LV PCM - Vienna, Nov 30 - Dec 4 Dmitry Morozov (IHEP, Protvino) 10

Prototypes Performance Original KOPIO design (Type-1) – no reflector, only full internal reflection, showed good performance Prototype without reflector, made for PANDA, (Type-2) had a non-uniformity of light collection up to +/- 15% because of missing pins, keeping space between lead and tiles. For the same reason it might have reduced light output. PANDA prototype with Tyvek between lead and tiles as a reflector (Type-3) showed good light collection and increased light output. It is selected as base design in the TDR. To clarify the light output increase for the Type-3 prototype and study the performance of the module with enough pins but without a reflector a new set of modules was produced at IHEP. 6 x 6 array is ready to be tested. Tests by cosmic rays are being performed now Collaboration recommended to perform test beam. Where? Mainz? When? Light output for Type-4 Proto ADC dynamic coverage LV PCM - Vienna, Nov 30 - Dec 4 Dmitry Morozov (IHEP, Protvino) 11

Shashlyk cosmics test setup New shorter HV bases The complete readout chain in triggerless mode Signal sampling by one SIS 3316‐ 250‐ 14 ADC utilizing developed feature extraction algorithm Study long-term stability and longitudinal homogeneity Time resolution measurements Quality control for production (24 modules at once – requires 3 ADCs and 48 PMTs) Tests of Cockroft-Walton HV control system Verification of the monitoring system LV PCM - Vienna, Nov 30 - Dec 4 Dmitry Morozov (IHEP, Protvino) 12

Test stand online data Online GUI Baseline, Amplitude and Timestamp info extracted The data with cosmic muons is being collected now LV PCM - Vienna, Nov 30 - Dec 4 Dmitry Morozov (IHEP, Protvino) 13

Schedule Oct 2016 - Dec 2019 – 3. 5 years Collaboration contract of IHEP with FAIR on the FSC by using the Russian contributed money into FAIR; Oct 2016 – Apr 2017 – build and test production readiness prototype Apr 2017 - Dec 2018 - manufacture parts and assemble all modules; Oct 2016 - Dec 2017 - manufacture all the mechanical support parts in Russia; Dec 2016 - purchase the photomultipliers and ship them directly from the manufacturer to Juelich, Germany; 2017 - purchase the readout electronics (Uppsala University) and ship it to Juelich; Dec 2017 - Feb 2019 - shipping the modules to Germany; Dec 2017 - Apr 2018 - shipping mechanical support to Germany; Mar 2018 - Aug 2019 - pre-assembly and on-site tests of the FSC modules at Juelich; 2019 move the whole assembled and tested FSC from Juelich to the PANDA experimental hall at FAIR, install the FSC in the PANDA experimental hall LV PCM - Vienna, Nov 30 - Dec 4 Dmitry Morozov (IHEP, Protvino) 14

Resources at IHEP: 28 people in total 17 FTE 14 experts from the IHEP PANDA (0. 3 to 1 FTE), 2 full-time designers, 2 full-time engineers 5 FTE technicians from the IHEP Scintillator Department. 5 technicians from the IHEP Mechanical Workshop will be part-time involved SADC development will be done at Uppsala by Pawel Marcinievsky Our cost estimate has shown that we can provide all the workpackages (except ADC) for 1. 352. 000 Euro (Costs in 2005) as it is fixed in PANDA Cost. Book Money profile: 2016 – 35% (Most of the materials should be purchased) 2017 – 35% 2018 – 20% 2019 – 10% LV PCM - Vienna, Nov 30 - Dec 4 Dmitry Morozov (IHEP, Protvino) 15

Conclusions Expecting positive ECE decision in July 2016 Technical Specification preparation for the Contract is in progress The goal is to sign a contract at October 2016 Software is being developed New prototype is produced at IHEP Beam test needed at Mainz(? ) To prove the coverage of ADC dynamic range To clarify the light output increase checking the difference between “Tyvek” and “No Tyvek” modules Cosmic test stand is assembled at IHEP (close to production facility) Production quality assurance Various tests 28 people at IHEP (17 FTE) + Uppsala group (SADC dev) 1. 352. 000 Euro (2005 Cost. Book prices) +SADC costs 2019 – ready for commissioning at PANDA Cave LV PCM - Vienna, Nov 30 - Dec 4 Dmitry Morozov (IHEP, Protvino) 16

Thank you! LV PCM - Vienna, Nov 30 - Dec 4 Dmitry Morozov (IHEP, Protvino) 17