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

LV PCM - Vienna, Nov 30 - Dec 4 Dmitry Morozov (IHEP, Protvino) 2 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

FSC Overview LV PCM - Vienna, Nov 30 - Dec 4 Dmitry Morozov (IHEP, Protvino) 3 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

FSC Requirements PropertyValue Energy resolution (σE/E)(2-3)%/√E(GeV) Photons energy threshold (E thresh )10 MeV (20 MeV tolerable) Single cell energy threshold (E 1 )3 MeV Noise, energy equivalent (σ Enoise )1 MeV Angular coverage0 0 – 5 0 Energy range10 MeV – 15 GeV Spatial resolution3.5 mm Load per cell1 MHz* Radiation hardness, maximum integrated doze 10 kGy* LV PCM - Vienna, Nov 30 - Dec 4 Dmitry Morozov (IHEP, Protvino) 4 * Based on luminosity 2x10 32 cm -1 s -1

FSC Design Sizes: ~3.6 m x 2.2 m Active zone: 3 m x 1.5 m (27x14 modules, 54x28 cells, 1476 channels) Beam pipe zone: 3x3 modules LV PCM - Vienna, Nov 30 - Dec 4 Dmitry Morozov (IHEP, Protvino) layers of 0.3 mm lead and 1.5 mm scintillator, total length 680 mm Transverse size 55x55 mm 2 Light collection: 36 fibers Y11 (BCF91A),  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

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 MeV to 12 GeV 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 PandaRoot revision Fixed many illegal geometry overlaps inside FSC volumes itself and with the beam pipe Checked with different versions of beampipe (201308, ) PID Bayesian algorithm The probability map (variations of p, E/p, Lateral moment, Z moments for 10 particle species) histograms BayesEMC.root was calculated by Ronald Kunne with rev (Jan 2012) at kinematical region: 0.2 GeV/c < p < 10 GeV/c, 5 0 < θ < We simulated and analyzed 10 7 events with extended region to cover FSC 0.1 GeV/c < p < 10 GeV/c, 0 0 < θ <  Revison used New BayesEMC.root is ready and can be incorporated to PandaRoot (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 110x110 mm 2 tiles, Bicron BCF91A 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 (55x55mm 2 ), Bicron BCF91A 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 55x55 mm 2 scintillator tiles were produced with new mold, Kuraray Y11 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 55x55 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. 6x6 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 The complete readout chain in triggerless mode Signal sampling by one SIS3316 ‐ 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 New shorter HV bases

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 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 Dec manufacture parts and assemble all modules; Oct Dec manufacture all the mechanical support parts in Russia; Dec purchase the photomultipliers and ship them directly from the manufacturer to Juelich, Germany; purchase the readout electronics (Uppsala University) and ship it to Juelich; Dec Feb shipping the modules to Germany; Dec Apr shipping mechanical support to Germany; Mar Aug 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 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 Euro (Costs in 2005) as it is fixed in PANDA CostBook 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

LV PCM - Vienna, Nov 30 - Dec 4 Dmitry Morozov (IHEP, Protvino) 16 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) Euro (2005 CostBook prices) +SADC costs 2019 – ready for commissioning at PANDA Cave

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