General Meeting Summary 7/15/21

PARTICIPANTS: Aaron Brown, Alexandre Camsonne, Arshak Asaturyan, Fernando Barbosa, Bogdan Wojtsekhowski, Brad Sawatzky, Brannon Semp, Camille Zindy, Carlos Munoz-Camacho, Carlos Yero, David Hamilton, Hamlet Mkrtchyan, Marie Boer, Stephen Wood, Steven Lassiter, Tristan, Tanja Horn, Vardan Tadevosyan, Vladimir Berdnikov, Charles Hyde, Hakob Voskanyan

LOW VOLTAGE POWER SUPPLY LAYOUT (Carlos and IJCLab-Orsay team)

• Discussion of proposal of LV power supply layout

• general layout with flat cables+extension PCB very good
• discussion of options to reduce number of cables/connectors - one option: daisy chain in groups at PMT
• chaining of all channels at PMT was investigated --> many cables make access to PMTs difficult

• Information on MPOD LV power supplies

• have three - each has 8 channels (4x +V/4x -V) - 16 are available
• may use +-3V

• Action items

• investigate model of Daisy chaining in groups of X channels
• calculation of voltage drop allowed (Fernando) --> determines how many channels can be grouped together

HV DIVIDER DESIGN UPDATES (Fernando, Vladimir, Carlos Y.)

• Prototype divider was tested

• obtained good results with laser

• Full divider test including linearity, noise, etc.

• intial test results encouraging

• Action items:

• Refined linearity test with two LEDs
• Test setup with shielding around PMT

• Note for final design: shielding mu metal around PMT - connect to ground

• need provision on PCB for final configuration

• Timeline: ideally collect information until end of the month

DSG UPDATES (Aaron)

• Hardware interlock system

• Extension cables

• Thermal calculations

MECHANICAL DESIGN/ENGINEERING (Steven L.)

• Ongoing work on cable layout from SHMS

• location bottom vs. top
• top: roof penetration - would likely require a new roof block

• Cable cart in procurement

• Downstream magnet and stands in design

NPS JLAB BUDGET ITEMS FOR FY22

• Request for rough estimates

NEXT MEETING: THURSDAY 29 JULY AT 9:00AM ET