Calibration System Updates 27/4/2017 C. Ferrari INO, UOS Pisa, Via G. Moruzzi 1, 56124 Pisa LNF, INFN Frascati

Installation in the laser hut finished Summary Installed three more source monitor boards (Na) Installed the fan-out board (Na) Connected 4 calorimeters (launching and local monitor fibers) Installed box with low voltage power supply for local monitor Aligned optical fibers (12/24) Done ORC walkthrough Trigger cable installed Installed digital delay box (< 128 ns) and digital pulse generator with delay (100 ns – 2000 s) Test on double pulse setup Installation in the laser hut finished To do list: Smoke detectors in the laser hut and racks, to obtain the ORC (Steve Chappa) Missing the PC to interface the WFD (Graziano) Firmware for the event builder (Na) Complete connection to the calos (20/24, calos are now in the ring): next two weeks Complete alignment of optical fibers (12/24) Equalization of the laser pulses

Calos connection Installed 13 boxes at the bottom of the trolley. B test: perturbation within errors Connected 4 calorimeters. Local monitor fibers held in position using Teflon

Alignment made with the power meter and the pc in the ring, my cell phone in the laser hut connected with the pc through Skype Laser threshold current always lower than 60% Trasmission collimator + fiber about 40%

LV box for LM Installed the low voltage power supply for the local monitor pre-amplifier boards

Local monitor The first peak of the LM is too big => replace filter in the SM (ND = 0.6) LM’s CH 24 is a reference, generated using an integrating sphere and 2 fibers of different length

Local monitor The first peak of the LM is too big => replace filter in the SM (ND = 0.6) CH 24 is a reference, generated using an integrating sphere and 2 fibers of different length

SERVE UN MONITOR oppure si usa uno degli altri laser. Double pulse setup Ottica standard: cubi, lenti, 4 collimatori 4 fibre di lancio Laser 7 Cubo 70:30 aggiunto Filter wheel Laser 3 L’allineamento del secondo laser non è semplice, si accoppia solo il 10% di quanto si accoppia il laser 3 (specchio E02, cubo 70:30, divergenza fascio), e ci sono differenze significative tra le varie fibre di lancio (fino al 50% di differenza) Configurazione INUTILE: la curva di guadagno del SiPM cambia di una piccola quantità (0.1 – 1%), la stabilità intrinseca del laser 7 non è sufficiente a studiare tale curva. SERVE UN MONITOR oppure si usa uno degli altri laser.

Digital delay & pulse generator Pulse generator with delay (100 ns – 2000 s) Digital delay box (128 ns)

Digital delay & pulse generator_2 Trigger from LCB -> DDG -> 2 output (or more) -> 1 NIM output to the NIM fan-out -> 1 NIM output (or more) delayed for double pulse

RUNCO request_1 You should now all be able to edit our internal webpage.  Instructions: make sure you’ve a current kerberos ticket (kinit) ssh yourusername@fnalu.fnal.gov cd /web/sites/muon-g-2.fnal.gov-internal/htdocs/ there you’ll find the various html and image source files.  please poke around and start building your subsystem page.  a template example from the field team is here and one from the vacuum chambers is here.  If something in this sequence doesn’t work please let me know Many critical subsystem hardware settings are controllable via the MIDAS ODB by shifters.  How does your subsystem plan to mitigate interference with your hardware by well-meaning but clumsy shifters?  One approach could be to have a dedicated control page for non-expert shifters and therefore only experts should be the ones accessing and manipulating critical hardware ODB values directly.  A dedicated control page could also allow convenient features like examples of good and poor quality data plots right next to the live data for easy health evaluations.

RUNCO request_2 List of “Expert on call”: Carlo Ferrari (training done) Diego Cauz (training done) Anna Driutti (eye examimation missing) Antonio Gioiosa Marco Incagli Carlo Gabbanini (eye examimation missing) Andrea Fioretti (eye examimation missing) Graziano Venanzoni List of “Shifter”: Nandita Nahra ? ?

To do list (March 27th) Test & alignment launching fibers (12/24); Test of the local monitor (2/24); Get permission to use the 6 lasers (SOP approved, ORC walkthrough done); Timing measurement (laser heads, optical fibers); Connect launching fibers and local monitor fibers to the calorimeters (4/24); Test of the flight simulator mode of the laser control board Optimization output Software. We expect to have the system fully functional in April

HV system CAEN SY5527 EMCO C15N output voltage 0 ÷ 3 kV 0 to -1250 V maximum output current 1 mA 0.67 mA voltage set resolution 50 mV 500 mV @DAC12 bit Current set 20 nA NONE Voltage ripple < 5 mVpp <0.002 % (200 mV @1000V) voltage monitor resolution 5 mV 100 mV @ADC16 bit current monitor resolution 2 nA Communications Ethernet or Wi-Fi Costo (Euro) 6000 x 24 CH 9000 x 48 CH 200 * 24 = 4800 +300 (conn SHV) +500 (24 ADC + 24 DAC) +2000 (scatola, PCB, alimentazione, uP, etc) Tempi messa in servizio 1 giorno installazione HW 2 giorni SW 3 mesi

Backup

Laser calibration scheme LASER HUT Mirror Laser calibration scheme Collimators RING Beam splitter Light distribution plate Mirror Beam splitter Fiber bundle Diffuser Collimator Secondary distribution box (X24) Crystals SiPMs Launching fibers Filter wheel Local monitor fibers LASER HUT Local monitors (20 CH) Source monitor Mini-bundle fibers from the source monitor Laser WFD