ISOLDE Physics Group Meeting (PGM) and Seminar

Thursday 7 May 2026, 14:00 → 15:15 Europe/Zurich

508/1-001 (CERN)

14:00 → 14:10 General announcements

Newsletter, outreach

CERN matters

Budget and administration

Technical
- Ventilation in primary areas has been restored, no restriction on vacuum pumping anymore.
- 4h cut in normal tap water at ISOLDE in the coming days, any constraints?

General
- What should I do if a new member (student, intern, post-doc, ...) is starting in my group? https://confluence.cern.ch/spaces/ISOLDEEXPERIMENTS/pages/696486356/Newcomers+Guide -> Note: needs to be on isolde-physics-group or isolde-house for access.
- PGM on Thursday 21st: INTC closed session in the afternoon

Speakers: Hanne Heylen (CERN), Prof. Luis M Fraile (CERN)

14:10 → 14:15 Overview of ISOLDE activities

https://isolde.web.cern.ch/isolde-hall-activities-ls3

• Construction of temporary access road to B. 197/508 for the TG CONS project (21,22 et 25 may). Reserved to vehicles involved in technical activities and deliveries. Expect that access will not be possible during those 3 days. Situation back to normal expected in July (regular road).
• CRIS measurements campaign on Cs: test a new lamda-scheme which they would like to use later for Fr + lifetime measurements

14:15 → 14:20 Safety announcements

• Beryllium (CuBe tools, windows, targets): who uses it? Let Hanne know.
• Cryogenics fundamentals- classroom training on 22nd. Register on waiting list.

Speakers: Hanne Heylen (CERN), Prof. Luis M Fraile (CERN)

14:20 → 14:25 Visits

Rota to be found on: https://cernbox.cern.ch/s/qbqEUB41tAvAzWa

Speakers: Hanne Heylen (CERN), Victoria Vedia (CERN)

14:25 → 14:30 AOB

Speakers: Amy Sparks, Carlotta Porzio (CERN), Christoph Schweiger (Max Planck Society (DE)), Hanne Heylen (CERN), Jessica Warbinek (CERN), Juliana Schell (Institut Fur Materialwissenschaft Universität Duisburg-Essen (DE)), Liss Vazquez Rodriguez (Max Planck Society (DE)), Prof. Luis M Fraile (CERN), Magdalena Kowalska (CERN), Patrick MacGregor (CERN), Peter Plattner, Tim Enrico Lellinger (Max Planck Institute for Nuclear Physics), Victoria Vedia (CERN)

14:30 → 15:15 ISOLDE seminar or Physics presentation by local group

Title: Improving Beam Delivery at OFFLINE2: Implementing TRIUMF’s Hybrid Automated Tuning Approach
Speaker: Omar Hassan (TRIUMF, CA)
Abstract: Implementing automated tuning techniques is a priority at TRIUMF, driven by a hybrid approach that utilizes the predictive digital twin, Model Coupled Accelerator Tuning (MCAT), alongside Bayesian Optimization for Ion Steering (BOIS). While MCAT computes transport and accelerated beam tunes, BOIS treats beam orbit correction as a black-box optimization problem, maximizing measured current. Combining these offers an efficient, physics-grounded tuning process. In a recent collaborative effort, this framework was applied to the OFFLINE2 facility. Successfully deploying the digital twin required addressing two distinct challenges. First, several discrepancies in the facility's baseline model were corrected to maximize the model's physical accuracy. This included correcting the quadrupole effective lengths while also ensuring fringe field effects were implemented. Second, phase-space tomography was performed to accurately determine the initial beam conditions. This presentation details the specific optimization strategies and tuning objectives executed at OFFLINE2 using TRIUMF's hybrid approach.

Speakers: Annie Dolan, Carlotta Porzio (CERN), Hanne Heylen (CERN), Omar Hassan, Omar Hassan (TRIUMF, University of Victoria)

OmarHassan-ISOLDE.pdf