AFP Beam Test October 19-29: Test Beam, Equipment, and Beam Optimization

1. AFP Fast Timing Beam TestOctober 19-29 UTA, U Alberta, Stony Brook U SLAC, OSU, UNM AFP Beam Test Mtg

2. Test Beam Oct 19 - 29 – People Coordination: DavideCaforio (Bologna) • Local AFP Timing contact: Justin Griffiths (UTA; CERN) UTA • Andrew Brandt: Oct 22 – 29 • Ian Howley (PhD): • Justin Griffiths (PD; CERN): Oct 22 - … • James Bourbeau (UG): Stony Brook • Michael Rijssenbeek: Oct 18 – 28 • R. Dean Schamberger: Oct 18 – 27 U Alberta • Jim Pinfold: • Shengli Liu: Oct 22 – 28 Saclay: Hervey +Eric Lecce: ? Silicon help with EUDET and data analysis: • korchak@fzu.cz; (OleksandrKorchak), Petr Sticho AFP Beam Test Mtg

3. HPTDC3 Connections (Shengli,Oct. 3, 2012) Ref. signal must be on CFD ch0 HPTDC#0 CFD#0 ??? Ref. Quartic DET Ribbon cable LVPECL 50pin Conn. 7 Trigger Forming Coax. cable Trigger Fan out NIM LEMO Conn. Coax. cable 40MHz clk 40MHz Clk#0 LVCMOS LEMO Conn. PLL & Fan out 40MHz 40MHz Clk#1 USB HUB Ref. signal must be on CFD ch0 40 MHz Oscillator HPTDC#1 CFD#1 Ref. Ribbon cable LVPECL 50pin Conn. USB Extenderremote To be prepared by Alberta: Threeribbon cables, not split, to connect CFD module to HPTDC; Raw cable + connectors for on-site cable manufacture Three HPTDC3 modules (NIM) DAQ Laptop(USB hub, extender, cables will be brought by UTA) 7 Coax. cable Trigger NIM LEMO Conn. Coax. cable 40MHz clk LVCMOS LEMO Conn. USB ExtenderLocal Note: HPTDC3 module draws 2 A/module from +6V of NIM bin, so a dedicated NIM bin is needed to host 3 HPTDC3 modules (CERN) Laptop AFP Beam Test Mtg

4. 40 MHz Clock + Distribution Replacement Reference Clock for beam test • needs a good, low-jitter fanout • output signals: LEMO connector, LVCMOS, (L=0V, H=2.5V), tH>3 ns • circuits suggested by Shengli: • 40 MHz clock fanout: CDCLVC1104PWR (Digikey); buy a SMD to DIP adaptor, digikey #33108CA-ND, to easily build on prototype board. • the local 40 MHz clock IC used in the HPTDC3 is: CB3LV-3C-40M0000 • construction by UTA? 40MHz Clk#0 PLL & Fan out 40MHz 40 MHz Oscillator 40MHz Clk#1 40MHz Clk#2 AFP Beam Test Mtg

5. Stony Brook will bring: Preamps: • TWO PA-a 8-channel PMT amps (power via output SMA) • TWO PA-b 10-channel amps (NIM) (delivers power to PA-a) • TWO PA-b single channel amps (needs +6V; delivers power to PA-a) • SMA cables • SMA/SMA couplings • SMA 50 Ohm terminators AFP Beam Test Mtg

6. Test Beam Electronics Layout Phase 0 Baseline layout (8×8 channels/side):  need fast, low-jitter analog fanout 19 ch ! Trigger TDC DAQ-PC CFD Att SiPM (SMA) Trg 110 TriggerLogic (NIM) Veto TDC Trg 16 × Signal (SMA) CFD Att PA-a Signals Data (50 Ω) PA-c PA-b RefClk LV+6V 5A LV+6V 20A HV 3 × HV crate crate Quartic Feedthrough crates AFP Beam Test Mtg

7. Required Instrumentation Light-tight box (LTE-22), improved version of January LTE • 60 cm (x) × 40 cm (y) × 60 cm (z) • feedthroughs for 20 SMA, 4 HV, 6 BNC (LV), 2 RS232 (Table controls) • need to finalize connections and order 2nd patch panel by Oct. 1 • 2 movable stages with remote control for two timing detectors: • range: ±5 cm in x, ±5 cm in y, ±5° in θC • resolutions:0.2 mm in x, 0.2 mm in y, 0.2° in θC • integrating into box • Improved top opening mechanism: need to add hinges LeCroy8620A 6 GHz 20 GS/s oscilloscope: LeCroy is arranging a loaner from LeCroy Geneva Various NIM and PSs from CERN Pool (list available)***?*** AFP Beam Test Mtg

8. Equipment Request CERN Instrument Pool AFP Beam Test Mtg

9. Test beam Goals: Radiator Optimization • Optimization of Single Quartic Bar with respect to • type of glass (Suprasil-1 vsSuprasil-UVL vs corning) • quality and extent of polish (will rough up bars) • transmission distance and width of bar (2 – 5 mm) • wavelength (filters) • use the scope and SiPm’s to evaluate the resulting timing resolution • UPDATE: 10 bars each 2x6x140 mm and 4x6x140 in Suprasil-1 produced by Hasko’s company and shipped to Marco; also have some plates for a “barless” design test. Hasko provided money for a couple more Suprasil hunks sufficient for ~two detectors. • UPDATE: Specialty Glass is machining 10 pc 3x6x140 and 5x6x140 Suprasil-UVL should be ready on time • A full 8-channel QUARTIC detector • optimize bars according to findings from 1, as possible • measure resolution, including correlations • using new preamps, old CFD, new HPTDC; • use SiPM’s and the reference clock • Two 8-channel QUARTIC detectors • Measure speed of light as cross check! • Added this to priority list after concerns about making physical measurement … • a repeat of a test at UTA’s Picosecond Test Facility Best achievable single Quartic bar Best achievable Quartic row AFP Beam Test Mtg

10. Test beam Goals: Radiator Optimization 4. Secondary goals (as time and resources permit) • Test a parallel fiber bundle as a Phase I detector option • Test an LBAR option provided by Michael Albrow • Received detector; need extra SiPM and LV power supply AFP Beam Test Mtg

11. Optimizing Detector: Radiator Single bar: Dimensions & Cerenkov angle: • Timing vs. height on bar and vs. width of bar • Optimize Cerenkov angle (varies with λ optimize for blue?) Type and polish of fused silica: • previously have used Corning (Specialty Glass) bars from Suprasil-1 (Heraus) and Suprasil-UVL (SG). Compare single bars of each material probed by SiPM. • Try different levels of polish to maximize amount of useful light. Wavelength: • use various filters, optical grease, to optimize the wavelength range (also neutral density filter to compare TTS with laser and beam) we have a detector and housing that allows easy swapping of bars+filters without losing alignment or having to uncable anything. AFP Beam Test Mtg

12. Easy Plug Single/Multiple Bar Detector AFP Beam Test Mtg

13. Optimizing Detector: Radiator 8-Channels: z-Segmentation: • Single row of 8 bars or 1 single plate (we didn’t make double wide bars) • Maximize the longitudinal (z) amount of quartz to get the most light. • Maximum z-depth is 53 mm • Jan’12 beam test with middle 6 (5x5 mm2) bars: σ=14±1 ps. • Design with 6 mm deep bars: expect 10% improvement; • using the full active area (53 mm) expect 15-30% improvement Simulation is planned for comparison with data: • The construction would be simpler and cheaper for the barless design. • Testing combining the z-segmentation into pairs of channels • would give more light, and reduce dynamic range required • would marginally increase impact of HPTDC resolution AFP Beam Test Mtg

14. Beam Test Preparation Coordination: DavideCaforio (Bologna) • Local AFP Timing contact: Justin Griffiths (UTA) Detector construction • Preparation of Light-Tight Enclosure (UTA) • Preparation/purchase of fused silica bars and sheets (Giessen, UTA) • Quartic Detector frames for single/multiple bars and the appropriate MCP-MAPMTs (***prepared at UTA***) Electronics (2 × 8-channel modules) • Amplifiers, attenuators (Stony Brook) ***ready soon, needs to be shipped next week for UTA system tests*** • CFD (Alberta, Stony Brook) ***use previous version*** • HPTDC (Alberta) Testing (UTA) • Ship equipment to UTA on or before October 1 ! ***Needs to happen! GET some schedule contingency by bringing some equipment on flight AFP Beam Test Mtg

15. Jan’12 Test Beam Setup sipm SiPM Shielded box! 60(w)x60(l)x40(h)cm Stony Brook Amp cards plug directly onto PMT beam QUARTIC Built by UTA for easyalignment and versatility Trigger paddles outside Box and SiPMsinside Use Bulls-eye laser for alignment AFP Beam Test Mtg

16. Draft TB Schedule Preparation (day -3 - 0) • set-up rack, crates, electronics, LV, HV, cabling • test the system with test pulses • set-up PC connections Safety Walk-Through (day 1) Commisioning(day 2-3) • test with PMTs, SiPM • Align SiPMs • Equalize gains, minimize noise, etc. Running 1: Single Bars +Scope (day 4-6) • dimensions • materials/finishes • couplings/filters Switch-over (day 7) Running 2: Full Detector + CFD + HPTDC(day 8-10) in parallel: • set-up PC connections • prepare Reference Clock • EUDET • prepare CFD-HPTDC readout • EUDET data connection • prepare 8-channel detector AFP Beam Test Mtg

17. Summary Need to strictly keep to construction schedule in order to provide in timely fashion (Oct 1 at UTA): • Electronics: Preamps, HPTDCs, cables, PSs • Radiators for testing • Detector box plus movable stages and controls • Not a lot of schedule contingency left • Need final confirmation on Friday, booking of flights, etc. • Hinges for box, extra patch panel, finish, packing, … AFP Beam Test Mtg

18. Instrumentation Funding Request • We will search for a suitable x-y-θ stage that matches these specifications, but estimate the cost about 4 kCHF/table plus controls (see e.g. www.velmex.com), so the total system would cost about 9 kCHF. Purchased: 5.2 kCHF, received • A Microchannel Plate MAPMT (10 um pore size) from Photonis. UTA currently has two 25 um pore tubes which are used in their laser facility for lifetime testing, and one 10 um pore tube on loan from Photonis with a promise they can keep it after testing it. Since we plan to use the 10 um tube for final installation in 2014, it would be very useful to have two 10 um tubes for the beam tests so that a full comparison of performance of the two types of tubes can be done. Estimated cost: 15 kCHF 7.5 k to be used for 25 um tubes purchase • U Alberta has a redesigned HPTDC board in production, which uses 3 HPTDC chips per 8-channel board. Two of these boards are needed for the test beam, but we only have 3 HPTDC chips in stock, just enough for a single TDC board, assuming full yield. So we request local funds for a small expedited order of about 10-20 chips to enable production of a set of these boards for laser tests and test beam is desirable. Cost: 20 x 60 CHF=1.2 kCHF. Purchased: 1.2 kCHF AFP Beam Test Mtg

19. Shengli’sTriggerLogic Ref Clock • Use new 12-channel HPTDC modules • Set-up and debug at UTA • ***Time growing short*** • ***Clock now locks, need to measure jitter* Draft Trigger AFP Beam Test Mtg