ISOLDE RC6 BI update

Tuesday 21 May 2024, 11:15 → 12:15 Europe/Zurich

508/1-001

20240521_RC6_DBs_overview.pdf

Talking points:

• Current layout of transfer beamline with planned DBs
• Status of YRC6.BDB.0500 (single low-energy style DB)
• Status of YRC6.BDB.0800/1600 and YRC7.BDB.0800 (three HIE-ISOLDE style DBs with extra diagnostics)
• Test hardware availability (MagneToF micro + in-vac SMA cable)
• DBs on HV platform
  • Collector plates for DC beam commissioning: design, readout, and responsibility
  • Single MR-ToF MS MagneToF mini: readout and responsibility
• Ion Bunch ToF data acquisition: what, how, and who? 

 

Meeting Minutes (provided by F. Roncarlo and C. Pasquino):

General discussion

• Lukas reminded us about the layout (new line concerns what's in between red lines in the 
  snapshot above).
• Design and integration studies Nicolas C, all ongoing as foreseen, should be ready soon to 
  launch manufacturing after checking all details, e.g. about interconnections among elements.
• Jose S. said he did simulate vacuum, will pass info.

Discussion about diagnostics

• First DB: confirmed that == standard ISOLDE scanner.
• For 3 HIE-type DBs. Each to be equipped with:
  • 1 ISOLDE-type) scanner (to be compatible with the option of having FC IN at the same 
    time).
  • 1 H+V slit, 45 degrees actuator.
    
    • Aperture to be confirmed. Lukas will propose apertures
    • May want to have two sets of H/V slits with different aperture on the same actuator.
      Concept: only one slit at a time overlapped to MagneTOF acceptance.
  • 1 FC IN OUT.
  • MagneTOF IN OUT.
• Don't forget for final design and drawings:
  
  • Slit must be upstream of MagneTOF.
  • Scanner must be upstream of FC.
  • if using present proposal H and V on same actuator): both Scanner and Slit must be on 
  • 45degrees actuator 
• Paulo to give Nicolas existing HIE Isolde DB drawings including actuators and detectors 
• Procurement of raw material for tanks can start immediately BC 63253  Puma RC6.
• Operation modes of HIE-type DBs confirmed to be as in the table.

Operation Mode	Beam Mode	Scanner	S+V Slit	FC	MagneToF
1	DC	OUT	OUT	IN (fixed)	OUT
2	DC	IN (Scan)	OUT	IN (fixed)	OUT
3	DC	IN (Scan)	OUT	OUT	OUT
4	Pulsed	OUT	IN (Scan)	OUT	IN (fixed)
5	Pulsed	OUT	OUT	OUT	IN (fixed)

MagneTOF

• next week a MagneTOF should arrive form Germany  Paulo-Jean-Miguel-Nicolas  will 
  inspect it 
• Miguel comments on the need for an AC coupler, related to MagneTOF (?). Lukas: positive ion, 
  bias voltage is negative. Discussion ⟶ yes: need AC coupler. Topical discussion needed.

DAQ

• Given the uncertainties on the real DC and pulsed beam charges that will come, BI proposes 
  to prepare electronics and local cabling able to switch DAQ from ISOLDE type to HIE ISOLDE 
  type.
• BI to  estimate cost and go back to PUMA project to see if compatible with what was 
  initially estimated by EB.
  
  

Request for Instrumentation on HV platform

• The Isolde beam comes at 30KeV (from the bottom on the slide), then it is decelerated to a few 
  KeV, bent to the Paul trap (to the left on the slide) for cooling and bunching. Then it's sent to 
  the separator (on the right on the slide) for mass separation and then re-accelerated to 30keV 
  to go to PUMA (top on the slide).
• All equipment here is on a platform kept at 30kV. 
  
  • to be seen how to manage DAQ. Miguel  looking into ‘ethernet-fiberʼ option 
• At the moment: The MIRACLS experiment is commissioning/validating the system (there is also 
  an offline ion source injecting into the Paul trap). But then they go away. Long term 
  responsibility to be defined, can be BI or ISOLDE or both.
• New diagnostics proposed by Lukas on this platform:
  
  • 4 ‘collectorʼ plates
    
    • to probe beam presence and some relative (no space for a real FC with repeller, 
      absolute measurement difficult) charge measurement. 
    • Plates can be mounted on CF100 flanges. 
    • IN OUT could be manual if not easy to motorize. Chiara proposes to have anyhow a 
      way to diagnose if they are IN
    • readout could be done via standard ISOLDE FC electronics
    • One readout channel for all 4 plates should be sufficient, signal cables will be manually plugged as needed
  • miniMagnetTOF
    
    • This detector already is installed in the MR-ToF MS (isobar separator) and is to be reused without modification (situated on a CF100 flange with SMA and SHV5 feedthroughs on a pneumatic actuator).
    • a possible solution is to maintain the present commercial TDC used by MIRACLS
    • Miguel and Lukas to discuss offline (note from after the meeting: TDC and software solutions will be explored, SY-STI already operates magneToF detectors at ISOLDE and ISOLDE-Offline2)
    • to be clear: including this, we would have 4 MagneTOF in total

To be discussed with survey team:

• Discussion with the alignment team for the type of targets to use for the tanks and type of aligning table.
• Discuss the need of bellows upstream and downstream the tanks (hydroformed preferred, EW if too limited in space)