[Alert_collaboration] [EXTERNAL] Fwd: Fw: Update on CEBAF & Beam Restoration

[Raphael Dupre]

Hi,


Please see the message below about the start of the accelerator. Note, 
that we are the second hall to be setup for beam, so we should not 
expect beam on the first day in any case.


Cheers,

Raphael



-------- Message transféré --------
Sujet : 	Fw: Update on CEBAF & Beam Restoration
Date : 	Tue, 18 Mar 2025 11:58:09 +0000
De : 	Patrick Achenbach <patricka at jlab.org>
Pour : 	Daniel Carman <carman at jlab.org>, Stepan Stepanyan 
<stepanya at jlab.org>, Raphael Dupre <raphael.dupre at ijclab.in2p3.fr>



All:
This results in an additional delay by some days for ALERT.
Patrick

------------------------------------------------------------------------
*From:* Douglas Higinbotham <doug at jlab.org>
*Sent:* Tuesday, March 18, 2025 00:03
*To:* Cynthia (Thia) Keppel <keppel at jlab.org>; Patrizia Rossi 
<rossi at jlab.org>; Mark Kevin Jones <jones at jlab.org>; Robert Michaels 
<rom at jlab.org>; Patrick Achenbach <patricka at jlab.org>; Eugene Chudakov 
<gen at jlab.org>
*Cc:* Eduard Pozdeyev <pozdeyev at jlab.org>; Simona Malace <simona at jlab.org>
*Subject:* Update on CEBAF & Beam Restoration

Since I am in CA likely won’t be at the 9:30 ET division meeting, so 
wanted to give you a quick update on when the earliest to expect the 
beam is.

I have received messages from Eduard and discussed on the phone where we 
are with the PD, Simona. I have also cc’d them on this message in case 
they want to add any details.

The high-level message is that RF recovery of cavities as well as 
getting new modules ready for operations has taken longer than 
expected.   This means the machine (both NL and SL)  is still under 1060 
MeV/linac that we would like to run at.    As soon as 1L09 is ready, NL 
should be in good shape.   SL needs numerous cavities to be 
recovered.    We are slowed at this point by limited spare parts with 
repaired boards are going in nearly as fast as they can be fixed.

The bottom line is the earliest we should expect beam for physics is 
Wednesday (March 26^th ).

As beam is close, it would be good for the RC’s to stay in touch with 
the PD.    I would encourage them ( especially C and D since they start 
the program), to start going to 7:45 meeting to stay informed as we seem 
to be closing in on first beam to the halls, even if it isn’t quite as 
fast as we would have liked.

Best Wishes from California,

Douglas
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