ISOLDE 44Ti meeting notes
28 Aug 2018
==To be ordered==
*Entrance window foils, TBD
3um Ti from Goodfellow? Is it light-tight?
*Gas bottles at CERN - Helium and (likely) Argon.
ISOLDE might provide them, but they never did for N2 gas
Gas bottle will need a regulator (new or old one)
*Spanners to help repair water chiller leak.
*FIRST CHECK VACUUM, CHILLER!*
NB: Might damage piping during re-assembly
We need the right imperial size (x2) for Swagelok.
Sizes? Email says 2x 9/16" but let's confirm
*High precision balance -- no need to buy
We are welcome to use the one in the chem lab on 2nd floor
Just wear a lab coat, and don't move other people's stuff
*PPE (Safety)
Boots and hardhats for new members
==To be repaired / replaced==
*Manual gate valve between SEC and Edinburgh chamber
Responsible: Peter, Daid, Conor, Katie, ...
The old one had a leak, we don't know where
It's on top of Peter's PC in his office
Students can test in Edinburgh...once leak is identified:
Fix ourselves or send to Lesker?
*Silena 7100 Quad Bias supply showed false readings during 59Cu exp.
Responsible: Daid, ...
Not yet repaired, Peter searches for manual
Alternative module was found and tagged for our use, needs testing
*ORTEC 474 TFA was returned to Edinburgh, owing to 10 V baseline shift
Responsible: Daid, ...
Useful for photodiode trigger. Take replacement back to CERN.
Tagged for repair.
Alternative module was found and tagged for our use, needs testing
*Take additional Pre-amp to CERN for Photodiode?
There are several in the Miniball cupboard...
*Teflon chamber feet stands
Responsible: Toby, Mirco, Daid
The original foot engraving diameter was too small, by mistake.
But what are the design specifications?
(Mirco picked these up for us, so they are in Germany?)
*Chamber stand wheel struts
Responsible: Peter, Daid, ...
Original ones are damaged at the ends, and also too long
Maria suggested 120 cm. We measured ~121 cm opening towards garage
To make less top-heavy, we can add a lower shelf and stack weight on it
==Decisions==
*How shall we integrate the beam intensity delivered to target?
Total integrated current, with efficiency-calibrated Ge detector
Talk to Liam?
Gold foil w/ back-scattering to photodiode?
Needs foil, mounts for foil & photodiode. Other parts prepared.
Alpha scattering in SSDs is another option
*Photodiode degrader foil for isobaric check
10, 15, 20 um Al are prepared at CERN, 2 blank frames in Edinburgh
What thickness is sufficient for 44Sc / 44Ti separation?
(...or other suspected contamination...)
*Gas cell entrance window material / thickness
*Target ladder setup
How many targets can fit & what should they be?
3 mm collimator
Photodiodes (takes two slots)
Viewing screen (?)
1 mm collimator (?)
Blank target frame (?)
==Work==
*Determine beam energies
Responsible: Conor, Alex, Daid, Karl, Alberto, ...
1.2, 1.55, 1.88, 2.2 and 2.8 MeV/u were stated as available
Karl mentioned the possibility of a beam test.
Previous beam was 44Ti+13. 40Ar may be a good pilot?
*Model effect of beam spot size -- still relevant?
Responsible: Conor
~3 mm FWHM was achieved for 59Cu
*Gas cell
Responsible: Katie, Conor
Vacuum system is set up in Edinburgh, and He gas is available
He gas bottle needs regulator, that's it.
Gas cell eventually needs to go to CERN.
Are we satisfied with the setup, or shall we get new parts?
(e.g. several new valves, ...)
*Chamber alignment
Responsible: Peter Black
Chamber is currently disconnected from the beam line.
Previously, we contacted the survey team to come assist.
Alignment parts are all at CERN.
*DAQ PC has any further issues to get on the network?
Responsible: Tom Davinson
(If PC is turned on, contact Ruchi as she would like some data.)
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