Participants: Simon Albright, William Andreazza, Fanouria Antoniou, Thomas William Birtwistle, Gian Piero Di Giovanni, Jose Antonio Ferreira Somoza, Vincenzo Forte, Eve Fortescue-Beck, David Hay, Bettina Mikulec, Antony Newborough, Gabor Petrika, Carlo Petrone, Serge Pittet, Andrea Santamaria Garcia, Jocelyn Tan.

Approval of minutes

The minutes of the LIU-PSB WG #221 meeting were approved.

Communications

LIU Project Team Meeting

• An LIU dedicated event will be held the week of the 11^th February 2019 and tentatively lasting couple of days outside of CERN, where the three main pillars of discussion will be:
  • The LIU beam parameter reach and the HL-LHC request.
  • LS2 planning and work advancement.
  • Plans for post-LS2 beam commissioning.
• Twenty-seven ECRs remain to be approved for LIU, five of which for LIU-PSB have not been circulated yet.
• A first internal review was held concerning the impact of the de-cabling and cabling campaigns for the Linac4-to-PSB connection, in particular for the Linac4 run in 2019. There might be an issue with some lighting cables during the lock-out period since they are connected to a PS power supply. This topic is being followed-up.
• The LS2 days will take place the 9^th -10^th of October 2018, where all the LIU activities will be addressed individually in the presentation from each group. J. Coupard will discuss the general schedule including all LIU activities.
• G. P. Di Giovanni reminded that the carry forward of the money not spent in 2018 will not be automatic and to please make sure that the EVM is up to date, as well as the schedule.

LIU Beam Performance Meeting

• Last meeting was focused on the intensity reach of the PS and SPS.

LIU-PT meetings with dedicated equipment group

• Meeting with TE-MSC

TE-VSC activities and status (J. A. Ferreira Somoza)

J. A. Ferreira Somoza summarized the activities of TE-VSC for the LIU-PSB by area:

BI line

• The new vacuum chambers for the BI.QNO30 and BI.QNO40 quadrupoles are currently being designed.
• The vacuum chamber for the new pick-up is ready for production.
• The BI.BVT10 and the new manifold vacuum chambers are in stock.

BT line

• The BT.DVT/BVT10 is in production. They need to produce the transitions of the pick-up. Some input from BE-BI is still needed.
• The new vacuum chambers for the BT.QNO40 and BT.QNO50 are in production.
• The BT.BHZ10 vacuum chamber is in stock.
• The support for the manifold does not allow for vertical alignment and resulted in a 1cm gap with the BT.KFA10. A new support with vertical alignment will be put in place.

BTM line

• All the vacuum chambers are in stock.

BTP line

• Everything is under production.
• There is a possible gap between the last pick-up and the next vacuum chamber (~10 mm space between the two flanges). The issue is being discussed with the integration group. It should not be a major showstopper as in case the BPM can be move the 10 mm upstream.

PSB ring

• Everything is in stock for the injection area.
• Concerning the extraction area, an ECR was sent for approval and everything is in production.
• Concerning the Finement cavities, there was one batch of non-conforming flanges that have been re-ordered. There was a defect on the angle, which increases the chances of leaking. Additionally, there was a mistake on the placement of the order so there is one support missing.
• The replacement chambers for periods 6 and 10 are under production.

Budget

• There will be a budget review next Thursday.
• Most of the works currently consist on mechanical assembly drawings and it is difficult to know when they will be charged.
• Concerning the mechanical assembly drawings, the budget allocated might be
• short. The open jobs already open will be finished, but there is yet no clear responsibility for the production of 3D models of the old lines.

Comments

• J. A. Ferreira Somoza commented that it is not clear who will pay for the mechanical assembly drawings, who will produce the 3D models, and who will update all the information at the end of LS2. TE-VSC was already asked to pay for some extra 3D models but had to refuse as the cost was too high for their current budget envelope. G.P. Di Giovanni recalled that this is a CERN-wide question, not only restricted to LIU and it should be discussed by the management.
• B. Mikulec asked about the general schedule. J. A. Ferreira Somoza answered that they don’t expect any delays.
• G. P. Di Giovanni asked if the budget is within their envelope. J. A. Ferreira Somoza answered that there are no problems budget-wise.

AOB

Update on the ECRs

Multiple groups

• Add a new BPM on the BI line (TE-ABT, BE-BI Christoph Hessler, Lars Soby): approved.
• Modifications to the Booster extraction main unit and BT1/4.BVT10, BT2/3.DVT10 (TE-MSC,TE-VSC, BE-BI, Antony Newborough Jose Antonio Ferreira Somoza): under approval.

Concerning the following topics, B. Riffaud communicated that the design works are in progress and will be sent to the integration team when complete.

• Magnet modifications in BT, BTM and BTP (TE-MSC, Antony Newborough)
• Beam instrumentation modifications in BTP line (BE-BI, Lars Soby)
• Installation of new BLMs on the PS Booster extraction lines (BE-BI, Christos Zamantzas)
• EN-STI beam stopper in BTP (EN-STI, Edouard Grenier-Boley)
• All related vacuum changes (TE-VSC, Jose Antonio Ferreira Somoza)
• Include reference to the ECRs for the BT Line Septa (TE-ABT, Wolfgang Bartmann)

TE-ABT

• Replace kicker BT.KFA10 (Luc Sermeus, Wim Weterings): approved, but the integration model needs to be updated.
• The rest are released or approved.

TE-MSC

• Upgrade of the BHZ Main unit bending magnets (Antony Newborough): under approval.
• Damping resistors on PSB bending and quad magnets (Antony Newborough): under approval. F. Schmidt will report at the next meeting.

TE-EPC

• Upgrade of PS Booster Corrector and Quadrupole Power Supplies (Louis De Mallac): under approval (integration needed).
• Booster Power House (BHP) Converters Upgrade (Serge Pittet): under approval (integration needed).
• Installation of the power converters for BI.SMV10 magnets for LIU PSB injection (Jean-Marc Cravero): under approval (integration needed).
• Installation of new Power Converters for PSB injection Qstrip, Correctors, Quad. (Serge Pittet): under approval (integration needed).

BE-BI

• New BLMs Installation in the LT, LTB and BI Lines for H- exchange monitoring (Christos Zamantzas): needed.
• Upgrade and consolidation of BT.BTV20 (Stephane Burger): needed.

BE-RF

• The New PS Booster RF System, Finemet Cavities (Mauro Paoluzzi): approved, but the integration model needs to be updated.

EN-STI

• Removal of 2 beam stoppers (BI.STPFA and BI.STPSW) on the BI line EN-STI (Edouard Grenier-Boley): approved, but the integration model needs to be updated.
• New PS Booster Absorber in Period 8 (Iñigo Lamas Garcia): under approval (new version needed following design changes).

EN-CV

• Removed from consolidation.
• Consolidation of the Booster chilled water plant (Gabor Petrika): under preparation.
• Consolidation of the Booster cooling plant (Gabor Petrika): under preparation.

EN-ACE

• New LBE line plus infrastructure (Aurelio Berjillos Barranco): under approval (integration).

Tour de table

• This is the last week to submit software requests to BE-CO.

Next LIU-PSB meeting: 9^th of October 2018 on the commissioning of the new wire scanner by Jose Luis Sirvent Blasco and an update on the resistance dampers by Frank Schmidt.