Proton Calorimetry/Meetings/2017/07/18

Minutes for UCL Proton Calorimetry Meeting, 5th July 2017 (D107, Physics & Astronomy, UCL)

Present

Simon Jolly, Anastasia Basharina-Freshville, Ruben Saakyan

RS:

• PMT bases are on their way from Hamamatsu!
  • Start with testing dynode 4 and 5.
  • Measure peak and average anode current with LEDs.
  • Check low rate performance first, then increase rate to check whether distortion occurs above 1MHz.

ABF:

• Running preliminary tests with photodiode circuit using Hamamatsu preamp.
• Hamamatsu finally provided correct resistor for preamp! 100 kΩ.
• Looking after summer students for Monday–Wednesday next week (Laurent Wednesday).
• Still waiting for response from Hamamatsu regarding low gain PMTs; modified PMTs and bases not yet arrived.
• Will chase up 10 mm sheets from Nuvia.

SJ:

• SMA components mostly here:
  • High quality Huber and Suhner components ordered for proton calorimetry; LOTS of less expensive (but still decent) spares available within group.
  • SMA-BNC and SMA-MCX adapters all arrived.
  • Waiting on 2:1 Mini-Circuits splitter.
  • Various lengths of Huber and Suhner SMA cable borrowed from John Mitchell (UCL Electrical Engineering).