ISOLDE Technical Coordination Meeting

Tuesday 6 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.
HRS.BFC4900 replacement and TE-VSC / survey access to HRS separator area

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_wk18.docx

ISOLDE_wk18.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)

1. GPS

1.1. Previous week: 135In for IDS

• Stable since last wednesday. No call over the week end.
• This morning, call from the user because of slight decrease in the yield, but lasers looked ok, and after reoptimization only 5% improvement which was probably fluctuations.

 

1.2. Current week: still 135In for IDS 

• Run until thursday morning

 

2. HRS

2.1. Previous week: coupling LIST target

• Installation of the LIST electronics in the HRS HV cage went smoothly.
• Coupling of the LIST target went smoothly.

 

2.2 Current week: Tm setup and LIST target optimization

• LIST performance assesment and Tm preparation
• Tm was found yesterday and lasers were optimized this morning
• Test on the beamgate leakage earlier today: with 1.4nA of K with BG open, there were no K anymore with BG closed.
• In the coming days, we will finish the LIST/PI-LIST setup/optimization.

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

• Ra-224/225 double collection from #887M ThC. 
• Preparation of the pumpstand for the release studies
• Irradiation of #899M VD-5 TaC
  • 2000 ppp with 0.5-1.5 uA of direct proton beam.
  • TaC pills on Ta boat instead of C-sleeve.

 

This Week

• Ra-224 dissolution and Ra-224, Ra-225 shipments.
• Tb-155 collection as molecular beams from #899M VD-5 (Patricijas PhD)
• Tb release studies un pumpstand.
• Target indirect  irradiation for K-43 and Cu-67 beams, starting thursday (TBC). 

 

Next week

• K-43 collection for PRISMAP user + Cu-67 developments (including MELISSA)
  • K-43 tests planned in R-002 in 179 on monday-wednesday.
• Preparation for Tm-165 collection
  • MELISSA setup
  • Target 885M direct irradiation (Ta foils - limit ppp to 2000 with 1 uA max) monday
  • Switch to indirect on thursday
• Release studies from TaC pellets

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

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

Physics

On GPS, 135In beams are sent to the Isolde decay station to study beta-delayed neutron emission with new high-resolution neutron detectors. This is a very exotic case with expected low yield. There were unfortunately several interruptions due to target/line trips and PSB, as well as a few issues with the IDS tapestation, so they might not reach the desired statistics.

Schedule

• Schedule until mid July updated with target numbers: https://isolde.web.cern.ch/sites/default/files/2025_overview_schedule_W13-29_v2.2.pdf
• No update on GLM/GHM situation
• Finetuning schedule for Thursday and Monday for start-stop Tm run

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

Speaker: Oscar Fjeld (CERN)

14:55 → 15:00 Safety, AOB, visits

ISS shielding plate, possible contribution for trolley ?
- Welded structure of the trolley 2220 CFH
- Wheels 535,80 CHF
TOTAL : 2755,8 CHF

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)

• 508 - non conformite of 13 power outlet boxes in 508 offline labs (ground floor, only on first floor, in kitchen)
  • Intervention of 1-2h per box, cut power of equipment connected but no impact on other items
  • IMPACT required?
• Letizia is back from maternity leave
• TRAKA update of permissions
  • Crane
  • RP Sources
  • Workshop