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.
  • Gated PMT will require a bit more thought...
• Scintillator sheets also shipped from Nuvia:
  • Samples of 100x100x10mm, standard and pTP enhanced composition, 0.3mm foil to be cut as needed.
  • Also 3mm pressed material included.
• WaveCatcher documentation for hardware and software available from Orsay:
  • 2–64 channel versions available.
  • Seems similar to Caen but with access to firmware.

ABF:

• Applied bias voltage to photodiode preamp: signal increases, so does noise...
• Will check photodiode with 1–100 ms integration windows.
• Will also check maximum integration window for Caen DT5740D QDC 16-channel digitiser.

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).
• Will email Ferruccio Renzoni and Peter Barker regarding coupling of photodiodes to electronics.

Dates Away:

SJ

28th July–11th August (holiday), 28th August–1st September (AWAKE installations), 4th–14th September (China).

ABF

29th July–5th August, 10th–21st August.

RS

7th–11th August (Modane), 18th August–2nd September (holiday).