14th COLD meeting

Monday Sep 28, 2026, 10:00 AM → 3:22 PM Europe/Paris

CTRM

Meeting 28th September 2026

 

Present:

 

SL (BD)

BJ (OPE)

JLR (OPE)

IL (OPE)

HPM (VAC)

PC (Safety)

PF (PSG)

PB (RF)

TB (MEG)

TR (ACU)

FE (DIAG)

NB (DIAG)

 

QQ (Dir)

 

Zoom not available

 

 

Discussion

 

WP01 

Purchases ok

 

WP02 

Screen monitors. Discussion with DESY. 

2 screens at end of TL2

 

WP03

Started vacuum simulations for the cavity. 

Cryomodule rather difficult.

Chamber would be simpler if as in-vaccum devices

 

Pumping from waveguides most relevant.pumping from sides (iris) 

 

Next Step: Add pumps to drawing

 

2nd cryomodule: as close as cryoinvacuum. Simple and work well. 

 

 

WP04 

 

First sketch for RF waveguides.

Rough mechanical drawings (to send today or tomorrow) to P.Berkvens for Safety simulations.

 

Full installation will move toward entrance door (further away from present linac)

 

Discussion with BIG to define LN2 distribution and water cooling. 

 

 

WP05 

No update

 

 

WP06 

Every WP check request for ELECTRICAL cubicles. 

Think about power for each cubicle

Kind of cable needed to be installed by BIG. Start list on Excel document

Cables will be on the same Database as EBS. COLD project cables naming managed by BIG. 

Need to calculate electrical power needed. If above 3000W signal to electrical unit to specify specific PS. 

If doubts on numbers of cubicles. 

RF group cubicles for LLRF still doubt. To be checked after LLRF quotation

 

 

WP07

No much progress

 

Progress with control of scandinova modulator . Works well. Still missing diagnostics such as waveforms to be reported in tango devices. 

Not easy support from scandinova.

 

PB: technicain from Scandinova on site to debug modulator.

 

 

WP08 

 

No update

 

 

WP09

 

Calculations still on-going. 

 

PSS found solution.

Switch from primary doors LB1 - to fence. Prevent switching off rips. 

People will enter first part of linac without impact on accelerator. 

Will implement during October SD. Ready for January restart for conditioning of RI accelerating structures. 

 

 

WP 10

PSG will buy 4 new PS for Quadrupole magnets. Will use spare part PS for the corrector and dipole magnet.

 

 

WP11

 

Cathode alignment angles are relevant issue. 

Cathode is flat or rounded? 

 

 

 

Shutdown activities

 

Crane during USM. Is OK.

PSS will be modified?

Removal of Faraday Cage beginning of November

Safety corridor on faraday cage side

 

G.Chazot working on a work permit JLogbook. Every one that has works to do on Linac upgrade, cold, or booster:—> fill JLOGBOOK work permit. Stating specificity of the work. 

 

I.Leconte will centralize all activities.

 

 

QQ: move to TDR. Try to get by next Spring (2027). 

JLR: could add Phase 2 and 3.

 

QQ: let’s wait for SAC and council to see overall LTSP

 

 

MEG COD waiting for Administration papers. 

 

 

1 general project update

Speaker: Simone Liuzzo (ESRF)

2 WP status round table

WP 01 RF
WP 02 Diagnostics
WP 03 Vacuum
WP 04 Mechanical Engineering: image from TB
WP 05 Infrastructure (planned works for SD 2026)
WP 06 Operation
WP 07 Control
WP 08 Alignment
WP 09 Safety
WP 10 Magnets
WP 11 Beam Dynamics
WP 12 Timing

Speakers: Alessandro D'Elia (ESRF), Hugo Pedroso Marques (ESRF), Marc Dubrulle, Pawel Borowiec (ESRF), Reynald Bourtembourg (ESRF), Simone Liuzzo (ESRF), Yann Gouez (ESRF)

Liuzzo_COLD_Errors_Sep2026.key

Liuzzo_COLD_Errors_Sep2026.pdf

3 shutdown activities

Co-activity October SD: grounding and cranes installation

priority to S-band RF-unit grounding and crane.

Cranes can be installed during USM?

Speaker: Isabelle Leconte

Meeting 24 September 2026_updated.pptx

4 Review CDR document

Conceptual Design Report:
https://www.overleaf.com/7899755955tmcgtsjgcdkt#10571a

MOVE TO Technical Design Report.

5 Planning and budget review

PLEASE SPEND what is needed to have items needed for Phase 0 (July 2027).

Use COLD budget CODES.

If possible, send to SL a planning for each item as in A.D'Elia presentation at the review panel.

Speaker: Simone Liuzzo (ESRF)

6 Human resources

welcome:
- PhD beam dynamics (3rd Aug 2026)

hiring in progress:
- LLRF (job description sligthly modified. Position to be opened again soon)
- MEG (Start next week)

planned:
- COD: RF (papers ready for DM)

7 AOB

Collaborations:

frame contract INFN signed!
frame contract PSI signed!

PSI Addenda drafts (for COLD activities) are agreed with the partners and need to be written and signed. LEGAL OFFICE WORKS ON IT.

INFN Addenda drafts in the hands of ESRF LEGAL OFFICE

SLAC collaboration contract, got feedback 24th Sept from SLAC. in the hands of ESRF LEGAL OFFICE

NEW!--> CEA Non disclosure agreement in progress. OK for ESRF with modifications. Need project description (simone).

Electrical cabinets soon to be purchased. NEED thermal control for the racks?

Faraday cage removal. 2-6th November

PUBLISHED PAPER to be used as reference for COLD/Linac6GeV project:
https://rdcu.be/Kboh2gS6w24a

@article{a2026cold-afc,
year = {2026},
title = {Cold cool copper operation linac demonstrator and preliminary studies for a 6GeV injector linac at {ESRF}},
author = {A, D’Elia and S, Liuzzo and P, Borowiec and V, Serrière and M, Dubrulle and M, Morati and S, White and F, Ewald and N, Benoist and K, Scheidt and B, Roche and C, Benabderrahmane and G, Le Bec and R, Bourtembourg and T, Rozier and J, -L Pons and D, Martin and B, Pelissier and L, Eybert and T, Brochard and C, Maccarrone and J, -L Revol and B, Joly and Y, Gouez and H, Pedroso Marques and P, Colomp and A, Dely and F, Falaise and D, Frichet and Q, Qin and E, Nanni and A, Dhar and W, -H Tan and G, Aymar and A, Latina and D, Alesini and F, Cardelli and A, Giribono and C, Vaccarezza and G, Silvi and M, Andorf and J, Maxson and P, Craievich and R, Zennaro},
journal = {The European Physical Journal Plus},
doi = {10.1140/epjp/s13360-026-08284-2},
abstract = {The {ESRF} mid-term plan for the upgrade of the injection complex foresees a 6 {GeV} full energy linac option. Given the space limitations of the site, the linac must fit in 145 m, compactness is a strong design constraint and high gradient technology is a potential candidate to fulfill this goal. {SLAC} cool copper distributed-coupling technology in C-band [1] was selected to realize such a compact injector linac. A demonstrator (Cool copper Operation Linac Demonstrator, {COLD}) for this technology will be installed at the {ESRF}.},
pages = {1096},
number = {9},
volume = {141}
}

Installation of cranes can take place during USM?

COLD Network meeting 2nd September 2026

EIC-pathfinder-OPEN project (reply in October)

8 update confluence page

check Pending Actions list from previous meetings

(MIND confluence will disappear, we should consider alternatives. Own cloud already in place. Indico for meeting minutes.)
https://confluence.esrf.fr/display/PROJCOLD/COLD%3A+Cool+copper+Operation+Linac+Demonstrator