ISOLDE Technical Coordination Meeting

Tuesday 13 May 2025, 14:00 → 15:00 Europe/Zurich

508/1-001 (CERN)

14:00 → 14:05 General news, agenda review, minutes approval

Minutes circulated for review
To follow, update of PLC for the target cooling water circuit to be scheduled with two targets cold.

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

14:05 → 14:20 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 ITM week 19_2025.docx

ISOLDE ITM week 19_2025.pdf

14:20 → 14:30 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)

Past week: Tm with LIST for COLLAPS.

• Laser system stable most of the time:
• Only one intervention on sunday at 3am. Problem: stabilization of the first step. Revolved in 2h.

 

Current week: In-source spectroscopy of Pm

• Switch of the lasers performed yesterday.
• Target needs to be changed because of strong yield drop during Tm run, which would prevent us to go for the full physics program.
• New target being prepared and hopefully will be exchanged tomorrow morning or afternoon.
• In the meantime, some tests will be performed with the current target to check the setup and start on long-lifetime species. Pm laser beam observed an hour ago and being optimized now.
• Plan to go to IDS or tape station to get some yield on the current target to compare directly with the next.

14:30 → 14:40 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

• Collection of  Tb-155 from di-fluoride molecular beams
• UCx target test for K-43 and Cu-67 runs
  • Unusable at MEDICIS because of mass marker at feedthrought 7

 

This Week

• Retrieval of Tb-155 from di-fluoride molecular beams
  • 19 MBq on foil with ~1 % total efficiency. 
  • Sample will be shipped next week. Radiochemistry - thursday.
• K-43 collection for PRISMAP user + Cu-67 developments (including MELISSA)
  • K-43 experiment in R-002 in 179 today-wednesday.
• HRS irradiation station cooling fan stopped working 
  • Intervention needed
  • Target 885M direct irradiation (Ta foils - limit ppp to 1200 with 0.5 uA max)
• Preparation for Tm-165 collection
  • MELISSA setup - friday
  • Switch to indirect (high trolley) on thursday 09:30
• Release studies from TaC pellets

 

Next week

• Tm-165 collection
  • Monday-wednesday
  • Shipping thursday - Denmark
• Release studies from TaC pellets
• Irradiation of TiC pellets for release studies
  • Exact time TBC
• MD for MEDICIS separator gas system and mass scan software

14:40 → 14:50 Targets, Schedule and Physics

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

Physics

• On HRS, neutron-deficient Tm beams were delivered to COLLAPS for laser spectroscopy measurements. This required a LIST target which is more complex to prepare and operate. Following earlier attempts, the goal was to measure ¹⁵⁰Tm and ¹⁵¹Tm. Yields appeared promising at the start of the run, but the target performance degraded over time. As a result, only data on ¹⁵¹Tm could be collected, with ¹⁵⁰Tm ultimately out of reach. Despite this, the users were relatively satisfied with the outcome.

• On GPS,  7Li beams were sent to VITO in the beginning of W20 to test behaviour of such light beams when changing the mass, in preparation of a run in the beginning of June.

Schedule

• This week, due to degradation of LIST target, it was decided to replace it with a spare. There are some modifications in the weekly schedule because of this.
• GLM/GHM for IS715/LOI281 foreseen to start week is cancelled. Ideas for IDS.
• Draft until the end of August needs feedback from technical teams, I'll organise meeting
• Protons end 8/12, can we still continue a few days with winter physics (Low E)?
• Plan for stable beam HIE-ISOLDE circulated, do you want to discuss in a meeting?

Miniball

• • Time: from Friday 30th May evening to Tuesday 3rd June morning
  • Beam: 22Ne
  • Intensity: between 5e6-1e7 pps (based on what is achievable; these numbers are from last year, so they should be realistic)
  • Energy: 3.5 MeV/u

ISS

• • Beam: 22Ne (the same as Miniball)
  • Energy: 6 MeV/u (higher than Miniball)
  • Intensity: 10^7 pps at ISS, or 10 epA at a charge state of 7+. We would be happy to take more if that is possible without a lot of optimization.
  • Time: Tuesday, June 3rd, morning – June 10.

XT03

• • No request this time

14:50 → 14:55 Hall activities / Mechanical workshop requests

Speaker: Oscar Fjeld (CERN)

14:55 → 15:00 Safety, AOB, visits

Update on EDMS 2816550, Installation of 1 Beam_Diagnostic Box and rename of elements at LA3 line"

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)

• New safety instruction on Smoking on Cern Site. https://home.cern/news/official-news/cern/official-news-regarding-cern-safety-rules-4. The prohibition to smoke within 3 metres of entrances and the obligation to dispose of cigarettes, including e-cigarettes, appropriately is however applicable with immediate effect.
• Intervention for fumehood GLM Wed 14/5 (tomorrow)