Proton Calorimetry/Meetings/2017/07/18

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

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), 5th–14th September (China).
ABF: 29th July–5th August, 10th–21st August.
RS: 7th–11th August (Modane), 18th August–2nd September (holiday).