[Acc_sem_comm] new XFEL approach from Sasha Zholents?

[Todd Satogata]

Hi Andrei,

Certainly, this would make a great division seminar. ODU folks
had thought a bit about corrugated waveguides a while back so Jean
and others would probably be interested as well. Pashupati is the
chair of the seminar committee so Rongli and I can follow up with
him; I'm also CC:ing the seminar committee email address. Cheers!

                                                 -Todd

======================================================================
Todd Satogata
Director, Center for Advanced Studies of Accelerators
Jefferson Lab
12000 Jefferson Avenue
Newport News, VA 23606
Cell: (631) 807-0674
======================================================================

On 8/4/24 2:55 PM, Andrei Seryi wrote:
> Hi Todd and Rongli,
> 
> Please see below abstract from Sasha about new approach for XFEL design.
> 
> This sounds intriguing? Maybe it may be useful to ask him give a seminar?
> 
>    Cheers
> 
>      Andrei
> 
> *From: *"azholents at anl.gov" <azholents at anl.gov>
> *Date: *Tuesday, July 30, 2024 at 15:22
> *To: *Andrei Seryi <seryi at jlab.org>
> *Subject: *[EXTERNAL] your AAC talk
> 
> Hi Andrei:
> 
> I missed a chance to tell you in person that I liked your talk. I call it “A Realty Check for Dreamers”.
> 
> During my stay in Naperville, I gave a seminar at APS/ANL on the subject covered by the abstract shown below.
> 
> I wonder if this topic could be of interest for accelerator scientists at Jlab?
> 
> Please let me know.
> 
> Thank you,
> 
> Sasha
> 
> *A Corrugated Waveguide-Based Collinear Wakefield Accelerator for a Hard X-ray Free Electron Laser*
> 
> The recent development of a corrugated waveguide-based collinear wakefield accelerator at the ANL marks a significant advancement toward realizing a facility with multiple high repetition rate hard X-ray Free-Electron Lasers. This achievement includes an improved understanding of the factors limiting accelerator performance and the successful design, fabrication, and testing of key accelerator components:
> 
>   * A 2-mm diameter corrugated waveguide embedded inside a strong-back structure for holding and cooling the waveguide.
>   * Sub-terahertz frequency electromagnetic couplers for extracting the unused wakefield and diagnosing the onset of beam breakup instability (BBU).
>   * A quadrupole “wiggler” composed of alternating polarity strong quadrupoles for beam focusing and suppression of BBU.
>   * A compact, small-gap force neutral adjustable phase undulator (FNAPU) for enhanced FEL performance.
> 
> The corrugated waveguides and couplers underwent rigorous testing with the electron beam at the Brookhaven National Laboratory's Accelerator Test Facility. Prototypes of the quadrupole "wiggler" and FNAPU were characterized in the magnetic field measurement laboratory at APS. These comprehensive tests revealed a remarkable agreement between actual performance and anticipated design parameters, underscoring the robustness of collinear wakefield accelerator technology for future applications in 
> the XFEL facility.
>