ISOLDE Technical Coordination Meeting

Tuesday 8 Jul 2025, 14:00 → 15:00 Europe/Zurich

508/1-001 (CERN)

1 General news, agenda review, minutes approval

• Minutes circulated for review

Speakers: Erwin Siesling (CERN), Joachim Vollaire (CERN)

2 Operation Report - REX/HIE ISOLDE update

Speakers: Alberto Rodriguez (CERN), Eleftherios Fadakis (CERN), Emiliano Piselli (CERN), Erwin Siesling (CERN), Joachim Vollaire (CERN), Miguel Luis Lozano Benito (CERN), Simon Mataguez (CERN)

ISOLDE_W27_EP.docx

ISOLDE_W27_EP.pdf

3 RILIS report

Speakers: Anjali Ajayakumar, Cyril Bernerd (CERN), Joachim Vollaire (CERN), Jordan Ray Reilly (The University of Manchester (GB)), Katerina Chrysalidis (CERN), Manikanta Elle (KU Leuven (BE)), Reinhard Heinke (The University of Manchester (GB)), Sebastian Rothe (CERN)

Last week : Po for CRIS 

Setup ready and stable until Friday very early morning when the AC turned off because of the chiller failure. 
All lasers were put on « saving mode » to protect for high humidity. 
Around 3pm the temperature was stable again and humanly adequate. Lasers were reoptimized and the Po ionization could proceed at around 5pm. 
Lasers were stable until the run was stopped on Sunday. 

 

4 MEDICIS & Building 179

Speakers: Charlotte Duchemin (CERN SY/STI/RBS), Edgars Mamis, Joachim Vollaire (CERN), Laura Lambert (CERN), Manikanta Elle (KU Leuven (BE)), Matthieu Deschamps, Patricija Kalnina (University of Latvia (LV)), Ralf Erik Rossel (CERN)

Last Week

• Ra-225 continued 2/2 and 3/2 over weekend collection for US
• Indirect irradiation of ThO target.
• TaC VD-5 target preparation and outgassing

 

This Week

• Direct irradiation of ThO target #742M - indirect
  • Ac-226 collection with the assistance of MELISSA
• TaC VD-5 target irradiation for Tb-149 tomorrow.
  • Target to be retrieved ASAP after protons are stopped

• External collaborator from NPL UK (Sean Collins) at CERN-MEDICIS
  • Ac-226 collection and measurement
  • Tb-149 collection and measurements
• 2nd batch Indian ThC target irradiation for Ra-223 collection tomorrow

Next week

• Ra-223 collection
  • Shipping in France

5 Targets, Schedule and Physics

Speakers: Hanne Heylen (CERN), Isabel Frank (CERN), Matthias Alexander Grasser, Simon Thomas Stegemann (CERN)

Tape Station Intervention on Monday July 07

- tape broke on Friday June 27 while rewinding, noticed on Monday June 30 in the morning
- due to current run on HRS, intervention was planned for Monday July 07
- planned to repair the tape, but tape was damaged on several spots (not to see from the outside),
  so decision was made to replace it
- intervention went fine, took a bit more time due to unforeseen preparation of the new tape, intervention was done at lunchtime
- vacuum leak was notice, Guillermo Merino (TE-VSC) was called to check after lunch
- checked all openings for vacuum leak, but no leak found (one o-ring of the tape station door was replaced to a small crack
  at the gluing which can cause a leak, but this was not the case)
- seemed that it was just the tape outgasing, vacuum this morning was fine again

https://logbook.cern.ch/elogbook-server/GET/showEventInLogbook/4336133

Many thanks to all involved!

 

 

Physics

On HRS, a run was carried out to measure the electron affinity of negative ions of Po isotopes at GANDALPH at CRIS. In previous years, producing negative ions at ISOLDE required inverting the polarity of several beamline elements, a relatively big task. This time, however, the experiment employed a clever method based on double charge exchange starting from positive ions, which is a very promising approach for future applications. Unfortunately, the run encountered several machine-related issues, and in the end, only a low-resolution measurement could be performed on Po, along with a repeated measurement of a previously studied case. Nevertheless, the experiment successfully demonstrated the feasibility of the technique and made the best possible use of the limited time available.

 

Schedule

Circulate different draft, make decision as soon as possible. Publish before end of the week.

6 Hall activities / Mechanical workshop requests

Speaker: Oscar Fjeld (CERN)

• SPEDE project
  • Looking into how to adapt cooling-system.
  • Design ready for the supports and new clamping. 
• Adaptor for air compressor 
  • Change to CERN standard 
• PUMA cooling system
  • Manufacturing of plate for water cooling piping.
  • Support for heat exchanger
• ISCOOL Switch
  • No response form ideasquare yet

 

7 Safety, AOB, visits

Speakers: Alexander Schmidt, Alexandre Dorsival (CERN), Elodie Aubert (CERN), Hanne Heylen (CERN), Line Le, Melania Averna (CERN), Mia Au (CERN), Nadine Conan (CERN), Oscar Fjeld (CERN), Simon Mataguez (CERN)

Présentation Wrap.pdf

Présentation Wrap.pptx

• Fumehood GLM intervention was successful

 

B197 works - civil eng works 

() staircase and turn style - slab nearly finished 

() to address concerns raised last week about noise and vibration, and no heavy C.E. works are expected