Participants: Simon Albright, Fanouria Antoniou, Fulvio Boattini, James Devine, Louis De Mallac, Gian Piero Di Giovanni, Jose Antonio Ferreira Somoza, Eve Fortescue-Beck, Bettina Mikulec, Antony Newborough, Serge Pittet, Fabio Pozzi, Andrea Santamaria Garcia, Jocelyn Tan.

Approval of minutes

The minutes of the LIU-PSB WG #216 meeting were approved.

Communications

General

• A review titled “Linac4 Towards Operation” was chaired by M. Lamont on Tuesday 26^th June 2018. The goal was to review the status of the Linac4 and the future planning ahead of the reliability run. The reliability run will start mid-August with the HW commissioning and it will last until December.

LIU-PT Meeting

• J. Coupard reported about the decision to send out all the ECRs checked by the configuration managers even if the integration is not fully completed. The approval process will be followed-up by the LIU-PLI meeting for the review and definition of remaining actions to get the ECRs approved and  released.
• All the WP holders shall contact Y. Muttoni in case they are blocked by integration studies

LIU Beam Performance Meeting

• The next meeting is planned for Thursday 5^th June 2018, where F. Antoniou will report on the PSB emittance measurements.

POPS-B project follow-up (F. Boattini)

• The main power converters have been installed and the associated equipment will be installed by the end of the summer (cooling pipe connection, LV switchgear and cabling, MV cables and cable heads, power transformers, magnetic and capacitor structures, and dummy load).
• The QTRIM converters will be tested in 2019. The first QTRIM converter prototype is expected in October 2018, the tests in December 2018, and the series production in September 2019. The commissioning is scheduled to take place in December 2019.
• The Trims 14 have been already installed. The Trims 23 will be tested in December 2018 and installed in February 2019.

Remaining activities for the POPS-B

By scheduled completion date:

End of July 2018

• BE-ICS: installation of smoke pipes on top of the converters.

Mid-August 2018

• EN/EL: completion of LV power and auxiliary cabling, testing of the installation, and installation of lights in the control room.

End of August 2018

• SMB/SE: installation of explosion vents.

LS2 / end 2018

• EN-CV: water treatment unit and routing of chilled water to the roof, installation of air intake grids (smoke extraction).

End of November 2018

• TE/MSC: replacement of damping resistors.

Sept-Dec 2018

• TE/EPC: commissioning of the power converters.

End of 2018 / LS2

• EN-CV: the realization of the water treatment unit and routing of chilled water to the roof.

LS2

• TE/EPC: tests of fuses protection.

Not scheduled:

• EN/CV: installation of air intake grids and modification of fire brigade cabinet.
• SMB/SE: steel door for capacitor room S401.
• SMB/SE: modification of floor plates in converter hall.
• SMB/SE: completion of CTRL room.
• SMB/SE: installation of blast doors.

Remark: the installation of the blast doors will be done by an external company, which incurs an additional cost of ~15kCHF, but it will guarantee a proper installation. In the budget code 76805 around 2.210 MCHF have been committed from a total of 2.234 MCHF. It has been estimated that an additional amount of ~30kCHF will be needed.

Comments

• G. P. Di Giovanni asked about the origin of the delay of the commissioning from July to September 2018. F. Boattini answered that the delay was shared between TE-EPC and the power converter suppliers. First, there was a misunderstanding with EN-EL about the number of cable heads to produce. Secondly, one of the engineers of the power converter supplier resigned and only one person remained responsible of the project.
• G. P. Di Giovanni asked if the shift in the commissioning period will affect anything critical. F. Boattini answered that it should not, provided that the companies follow the schedule. B. Mikulec asked if the summer period will affect the collaboration with the suppliers. F. Boattini answered that the companies have guaranteed the follow-up of the project.
• B. Mikulec asked about the impact in the schedule of the delay of the commissioning from July to September 2018. F. Boattini answered that schedule has been cut in terms of margins but not on functionality tests. B. Mikulec commented that there is very little margin for the series production. F. Boattini answered that the product is well-established, with only a minor change from the functional point of view.
• B. Mikulec asked if the controls will be ready for operational testing in April 2020. F. Boattini answered that the control software of the power converter is ready and that the quadrupoles will be tested in December 2019, which constitutes 90% of the work.
• G. P. Di Giovanni asked if the extra 30kCHF will be on top of the remaining budget. F. Boattini answered that it will.

AOB

• L. De Mallac reported that the ECR concerning the Q-strips is going through the integration process.
• V. Forte reported that pyOrbit simulations of the LHC-type and ISOLDE-type beam wth the updated Linac4 parameters were carried out.
• A. Newborough reported that the BTP quadrupoles were delivered and that the field quality is good, so the series production was launched. The delivery of the BTM.BHZ10 magnet is scheduled for February 2019 (it was originally planned for February 2018, hence the variance in the schedule).
• B. Mikulec commented that since the PSB will be completely locked out during LS2 it is necessary to identify the equipment needed for the LBE run with Linac4 that is located in the PSB building. Some examples are the BIS, BI equipment (BLMs, watchdog), CO (timings), or the WIC.
• S. Albright reported that the study to introduce a mini flat-bottom before injection for the Q-strip power converter is advancing well and the plan is to circulate the newly proposed cycle to the different experts.

Next LIU-PSB meeting: 17^th of July on an update on the status of the 245 building by Jérôme Rodary.