- 1st (kick-off) meeting (20-03-2012):
LRFF (LHC
RF Fingers) Task Force: Kick-off meeting! (EM).
- 2nd meeting (27-03-2012):
Past work on the PIMs, PIMs' crisis and PIMs Working Group (EM. EM discussed with Pierre Strubin
on Monday afternoon),
Start of the equipment review: some equipments from TE/VSC =>
Vacuum Modules in
LHC Experiments
(VB).
- 3rd meeting (03-04-2012):
News on the VMTSA impedance:
CST simulations (BS), Past
development work on RF contacts (Sergio Calatroni),
Picture from PETRA III with an RF
finger problem (Rainer Wanzenberg, DESY).
- 4th meeting (10-04-2012): Equipment review: some equipments from TE/VSC =>
Vacuum
modules in the LHC septa (VB).
- 5th meeting (17-04-2012):
What was wrong
with the Plug-In Modules (PIMs) in the cold part of LHC? (Pierre Strubin).
- 6th meeting (24-04-2012): Equipment review: some equipments from BE/BI (RV).
- 7th meeting (08-05-2012):
Equipment review: some equipments from TE/ABT (MB
and WW).
- 8th meeting (29-05-2012):
Longitudinal
impedance simulation studies of VMTSA (OK).
- 9th meeting (05-06-2012):
New design for RF fingers (Cedric Garion,
TE-VSC-EIV) and
Some pictures of the wake field suppressor in the LHCb VELO (EM).
- 10th meeting (12-06-2012):
Past impedances studies with the RF fingers for
some
collimators (AG) + slides (AG).
- 11th meeting (26-06-2012): More information about the wake field suppressor in
the LHCb VELO (Massimiliano Ferro-Luzzi, PH-LBD),
TDI
and VMTSA temperature history (VB).
- 12th meeting (21-08-2012):
Beam impedance of
63mm VM with unshielded Bellows (OB),
Longitudinal impedance of new RF
fingers (BS),
Electromagnetic Simulations of VMTSA Equipped with the Longer RF Fingers (OK),
Typical NC in Warm Modules Following X-ray campaign (VB).
- 13th meeting (11-09-2012): Review of ferrites used at CERN to damp HOMs:
references, manufacturers, thermal treatments, etc. (all the groups: TE/VSC,
EN/STI, TE/ABT, BE/RF, BE/BI,
BE/ABP,
EN/MME,
etc.) and discussion about the ferrite for the BSRT (SlidesFromMG).
- 14th meeting (25-09-2012):
Status report of this task force (EM).
- 15th meeting (16-10-2012):
Measured TT2-111R ferrite's properties: EM-wise (ChristineV)
+
additional slide from ChristineV
and
vacuum-wise (VB).
- 16th meeting (23-10-2012): Follow-up of the previous actions (everybody) =>
Starts to become URGENT!
- 17th meeting (30-10-2012): Follow-up of the previous actions from 14th, 15th
and 16th meetings (everybody) => Starts to become URGENT! EM (Action 19):
Penetration
depth in ferrite and practical recommendation for the thickness (EM and FC),
AlessandroB (Action 12) and
OK (Actions 5 and 6).
- 18th meeting (06-11-2012): Follow-up of the previous actions from 14th, 15th
and 16th meetings (everybody) => Starts to become URGENT!
MG (Action 1),
OB
(Actions 11 and 2) and
FC and MB (Action 9).
- 19th meeting (20-11-2012 => Last working meeting!): Follow-up of the previous
actions from 14th, 15th and 16th meetings (everybody) => Starts to become
URGENT!
AlessandroB (Actions 15 and 16),
Some RF
contacts (with power transmission lines) issues in 2012 in the SPS (Eric
Montesinos), Some pictures of the TCDD of sector A4L2 with some twisted RF
fingers: 1,
2,
3,
4 (VB), Discussion about abstracts for IPAC13.
- 20th meeting (27-11-2012):
- From 09:00 till 10:30: Wrap-up by EM:
pdf and
ppt (including comments made during the meeting).
List of all the non conformities (VB).
- At 19:30: FONDUE at the "Cafe du Soleil" (Petit-Saconnex) =>
Picture.