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v3.3.3-pre
As an introduction, the scope of the review was reminded, and the extend of the RF WP was briefly summarized.
Maria Elena Angoletta presented the HLRF, LLRF and intensity /longitudinal Schottky systems and reminded the reasons for this consolidation work, which is to support the long term program of AD/ELENA machines.
The replacement of the C02 cavity by the Finemet system, plus ancillary systems adaptation. The remaining work on this side consists mainly in the installation of the new cables (planned in the current cabling campaign) and the installation of the new control system, to lead to the HW commissioning in February 2021.
The LLRF and longitudinal diagnostics are twins of those under development for the ELENA machine. Part of them have already been deployed in ELENA and others are still under development. Upgrades of OP and FESA classes as required by CO and the LLRF integration in the cycle editors are planned for 2020.
On the side of the HW, some issues with boards manufacturing have caused some delays and minor over cost, that will hopefully be adsorbed by the contingency in the allocated budget.
Simulations have been carried out to understand the beam stability with the new RF Finemet cavity, with encouraging results.
For the C10 system (that was not part of the presentation), 3 new tubes are expected this year. The consolidation of the C10 high voltage power converters is also being considered by TE/EPC.
On the financial side, the remaining budget is anticipated to be sufficient for the work completion, Maria Elena asked that a budget carry over to 2021 is allowed, as the LLRF installation and LLRF/HLRF hardware commissioning will take place only in 2020.
On the planning side, Maria Elena outlined that in 2020 the highest priority for the LLRF/HLRF teams will be the PSB, followed in the second place by ELENA. The team plans to validate in ELENA, during the months of May to July 2020, features needed by both ELENA and the AD. It is important that the work can progress in ELENA as much as possible, as the team will not be able to spend much time on AD developments from August 2020 onward, owing to the PSB commissioning with beam. It is possible however that in case of unforeseen problems in the PSB development or in case of problems with the source, the features validation with beam in ELENA will be cut short. For 2021, Maria Elena underlined two main concerns.: First, only two weeks are allocated for the commissioning of the AD ring with beam, in April 2021. Considering that the LLRF and the HLRF will be totally changed, that the stochastic cooling has been uninstalled and reinstalled again (with some modifications) and that some magnets have been refurbished, this seems too short a time.
The second concern is that the LLRF team will have to work on other machines in parallel to the short restart time of the AD. As a consequence, Maria Elena asked the OP and department management to clarify the priorities, and in particular the priority of antiprotons with respect to ions for 2021.
Wolfgang Hofle gave the status of the AD stochastic cooling WP. The role of this vital system in the AD cycle was reminded.
For controls of the Damper and the pick-up movement new controls are already in place. The repair and test of the amplifiers is ongoing.
The recommissioning requires a test of the machine simulation full energy for 1 h, which was not possible in 2018. The cooling system has to be fine tuned to make this test possible.
On the financial side, the reprofiling allows to match resources with the available people. Nevertheless, the consolidation of the stochastic cooling kicker has to be considered given the expected increased life time of AD. A team should be trained to acquire the knowledge so that a program can be proposed, most likely for LS3. No budget exists for that yet. Same for the cryo probes inside the pick-up.