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

2. 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

3. 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

4. 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%

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

6. 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

7. 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

8. 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.

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

10. 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

11. 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
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.

12. 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 ? ?

13. 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

14. 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 bit
Current set
20 nA
NONE
Voltage ripple
< 5 mVpp
<0.002 % (200
voltage monitor resolution
5 mV
100 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

15. Backup

16. 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