15th COLD meeting

Friday Oct 23, 2026, 11:00 AM → 4:22 PM Europe/Paris

CTRM

zoom link

Present:
ILeconte, G.Chazot, P.Borowiec, E.Torlack, H.Pedroso Marques, A.D'Elia, T.Brochard, S.Richot, R.Borutenbourg, P.Falaise, M.Dubrulle, M.Morati, C.Benabderrhamane, F.Ewald, Y.Gouez
Remote: Qing Qin, T.Rozier, B.Tommasini)

So welcome to this meeting. I'm happy to see many people. Last time you were not so many. So by the way, thank you for attending. It's 15th already called the meeting update meeting.

And there are no general project updates, I would say. So I will leave the work to the roundtable as usual, and we start with them. Every work package. So, Alistair.

WP01
Alessandro D'ELIA: The most important news is about the LLRF. Quotation of about 400,000 euros, but for a FULL package.

LLR is a Plug and play solution for LLRF. The LLRF part is about t what we are expecting. Now we have to decide what we have to buy.
More important to hire the new COD guy.

During my absence, thanks to Simone, Pawel and Anne, they managed to change the profile from the new position. It's the same position, but it's a slightly different profile.

We did not yet receive the quotation of the web guides. But we received the 1st proposal from Spinner, and we discussed it with Spinner.

A way to see whether this proposal is correct or not. And then, of course, also in this case, unfortunately, we have to go for CFT, because of the price.

 I hope to try to launch the CFT of the Waveguides before the end of the year. I don't know if I will manage because I need to work on specification.

Beginning ofnext year, we have to, lunch the CFT For the load and isolator under SF6 that have long lead times of 11 or 12 months. We need to start the launch depending on the status of the collaborations.

A.D'Elia and M.Dubrulle, going to Scandinova 24th, 26th of November for the FAT, S-Band.

Spend delivery marked in the contract for 18th of December 2026. Okay, it's not a problem, but I will discuss it with BJoly, to find a place.

WP02 no news

WP03 vacuum, purchase of new pumps for COLD. Some still to be determined. No space to install the pumps, but drawings yet to be finalized. 

ACTION: Post meeting note: Pumps could be placed in other location instead of directional coupler to make them accessible

If we have to dismantle one of these pumps, we have to move the cryomodule? 

No, if there is no other model of vacuum pump, we can actually make a connection that goes down, that makes it dismountable.

WP04 
9->12 racks
installation moved towards concrete door
Space between dump and RI section increased.
Dump placed before slab joint.
ONE tunnel hole NOT needed. Will not be DRILLED.

MMorati: issued with one simple axis crane to install klystron. Will need to move the modulator eventually. 
NOTE: LONG discussion on this topic not reported here
ACTION: SUMMON ALGE for alignment of cranes, holes in tunnel wall and modulator
ACTION: SUMMON SCANDINOVA to get updated drawings, realistic and exact of the RF unit.
(Drawings are not accurate)

There are no bellows, the margin is very small. 

Check differences 

ACTION: ALGE measure modulator 0.

P,.Borowiec. make sure that output flagon klystron with respect to ....??? (ACTION get exact statement from Pawel)

WP05
LN2 delivery safety and big finding a solution for the correct location of the LN2 tank. Should avoid maneuvering for the track and be far from rain water.

HLS will be removed and put back later.

Scheduled drilling
Crane installation confirmed
Crane need margins
(Margin is half the diameter of the tunnel wall holes)

WP06 presentation by ILeconte.
ACTION: cover rasin of manholes. 
ACTION: erase marking of tunnel wall hole that will not be done

If corings are late in January:
Plan B: work in morning-afternoon shifts
Plan C: cancel/delay one of the corings

Water cooling installation SUMMER 2028. Before using temporary installation (all Phase 0)

WP05 considering to install a permanent compressor to open the concrete door. But must be considered, we need to pen 3-4 times. 

Safety corridor for cranes installation will be fences to identify the work area.

WP07 control
Meeting with I-tech. With LLRF, also tango DS is delivered. Very good news. 
ALGE equipment easy to integrate

WP08 no news
WP09 no news
WP 10 Phase 0 ok. For Phase 1 need correctors strengths and quadrupole moving ranges
ACTION: need correctors strengths and quadrupole moving ranges

WP 11: uniform distribution better for emittance. Could be implemented at a later stage with a collimator (iris) after the gun.

G.Chazot presents the electronic logbook. 

ACTION: Next meeting we need to discuss CABLING
ACTION: plan a meeting with legal office INFN-ESRF for collaboration contract.

 

11:00 AM → 11:05 AM general project update

Speaker: Simone Liuzzo (ESRF)

11:05 AM → 11:10 AM 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)

Meeting 23 October 2026.pptx

11:10 AM → 11:20 AM 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

11:20 AM → 11:30 AM Electronic work permits

Speaker: Gilles Chazot

INJ-UPGRADE-PTW-22102026.pptx

11:30 AM → 11:35 AM 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)

11:40 AM → 11:42 AM 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)

11:45 AM → 11:50 AM 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.
INFN wants to be paid to balance the contribution of INFN.

LEGAL office NEEDS a detailed TASK list

proposed TASK (DATE + cost) list to discuss with INFN:
- INFN/ESRF commissioning of COLD project linac:
- (Dec 2027) INFN Dark current measurements ( ? person/month (scientist) + ?kE travel expenses)
- (Jan 2027) ESRF Dark current measurements with quadrupoles powered (0.5? person/month (scientist))
- (Oct 2028) INFN beam parameters at gun exit and solenoid tuning and alignment (? person/month (scientist)+ ?kE travel expenses)
- (Nov 2029) ESRF beam steering to the beam dump and alignment of accelerating structures (0.5 person/month (scientist))
- (Nov 2029) INFN measurement of emittance (? person/month (scientist)+ ?kE travel expenses)
- (Dec 2029) ESRF measurement of beam energy (0.5? person/month (scientist))
- (2027-2028) INFN advice and support for gun, waveguides and accelerating structures low power and high power conditioning (? person/month (scientist, engineer, technician))
- (2027-2028) ESRF gun, waveguides and accelerating structures low power and high power conditioning (? person/month (scientist, engineer, technician))
- (2027-2028) INFN advice and support for laser, timing and LLRF systems (? person/month (scientist, engineer, technician))
- (2028-2029) INFN training of ESRF personnel on the operation of the photoelectron gun (in person and remotely via email and zoom meetings) ( ? person/month (scientist) + ? person/month (engineer) + ? person/month (technician) + ?kE travel expenses)
- (2026-2027) INFN revision and integration of simulations for the COLD project
diagnostics setup and measurement techniques (in person and remotely via email and zoom meetings) ( ? person/month (scientist) + ?kE travel expenses)
- (2028-2029) INFN expertise-support for the upgrade and maintenance of the
photoelectron gun (in person and remotely via email and zoom meetings) ( ? person/month (scientist, engineer, technician)+ ?kE travel expenses)
- (2027, 2028, 2029) INFN participation in 3 review panels meetings ( ? person/month + ?kE travel expenses)
- (2027, 2028, 2029) ESRF participation in 3 review panels meetings ( ? person/month )
- (date) INFN … ( ? person/month + ?kE travel expenses)
- (date) INFN … ( ? person/month + ?kE travel expenses)
- (2027-2029) ESRF S-band RF-unit to power the photoelectron gun (1/6th of the usage/depreciation cost over 2 years ~ 15 kE )
- (2027-2029) ESRF C-band RF-unit to power the accelerating structures (1/6th of the usage/depreciation cost over 2 years ~ 16 kE )
- (2027-2029) ESRF electromagnets (1/6th of the usage/depreciation cost over 2 years ~ 1 kE )
- (2027-2029) ESRF vacuum system (1/6th of the usage/depreciation cost over 2 years ~ 1 kE )
- (2027-2029) ESRF liquid nitrogen infrastructure (1/6th of the usage/depreciation cost over 2 years ~ 2 kE )
- (2027-2029) ESRF water cooling and electrical infrastructure for the COLD project linac ( 1/6th of the usage/depreciation cost over 2 years ~ 1 kE )
- (2027-2029) ESRF photoelectron gun (1/6th of the usage/depreciation cost over 3 years ~ 2 kE )
- (2028-2029) ESRF alignment of the photoelectron gun, solenoid and cryomodules (2(?) person/month)
- (2026-2027) ESRF mechanical engineering of the diagnostic section following
the photoelectron gun (2(?) person/month)
- (2028-2029) ESRF operation cost of the linac ( 1/6th of the operational costs over 2 years ~ 5 kE )
- (2026-2029) ESRF safety aspects of the photoelectron gun (2(?) person/month)
- (optionally and additionally all the above replacing
"photoelectron gun" with "RF-deflector”)
All the dates reported are indicative and linked to the progress of the project. Delays may arise and will shift the dates accordingly.

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

NEW!--> CEA Non disclosure agreement in progress. SIGNED

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)

11:50 AM → 11:51 AM 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