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  • richardmitnick 12:11 pm on March 28, 2017 Permalink | Reply
    Tags: Accelerator research, , , , ,   

    From FNAL: “LCLS-II prototype cryomodule: a success story 

    FNAL II photo

    FNAL Art Image
    FNAL Art Image by Angela Gonzales

    Fermilab is an enduring source of strength for the US contribution to scientific research world wide.

    March 22, 2017
    Rich Stanek

    More than 150 people at Fermilab have contributed to the design and assembly of the prototype cryomodule for LCLS-II. Photo: Reidar Hahn


    A project is like a good book: As you complete one chapter you start the next, but sometimes you cannot wait and you read ahead.

    The LCLS-II project, a next-generation X-ray light source being built at SLAC, one that is based on a superconducting RF electron linac operating in continuous-wave mode, has completed Chapter One – the prototype cryomodule (pCM). And now we are already well into the assembly of the second, third and fourth cryomodules.

    As one of the partner labs, Fermilab is responsible for the design of LCLS-II’s 1.3-gigahertz cryomodules, as well as assembly and testing for 19 of them. (LCLS-II will have a total of 40 of these cryomodules, and Jefferson Lab is assembling the rest.) Additionally, Fermilab is designing and will assemble and test three 3.9-gigahertz cryomodules and has responsibility for the procurement of the cryogenic distribution system for the LCLS-II linear accelerator.

    The pCM assembly and testing have been very successful, due in large part to the technical skills and dedication to quality of our entire team. Still, it was a learning experience, which has made our SRF and cryogenic organizations in the Accelerator and Technical divisions stronger and more tightly connected.

    The pCM met most of its acceptance criteria, to the point where it could be used in the LCLS-II linac. The majority of the design has been verified; the energy gain exceeds the specification; the average quality factor exceeds the goal and sets a new world record (3.0 x 1010); the superconducting magnet meets specification; the new tuner design was verified; the modified fundamental power coupler (in continuous-wave operation) was shown to meet specification; instrumentation and controls worked as planned; and the implementation of magnetic hygiene (first time in a cryomodule) was very successful.

    The one issue that remains is to reduce the microphonics levels so as to allow better amplitude and phase control of the cryomodule’s eight accelerating cavities, which must operate in unison.

    I must stress again how this success was driven by our team effort. Particularly evident in the pCM testing was the ability of the Technical and Accelerator division personnel to work together to accomplish the task at hand.

    The challenge to design, build and test the prototype CM drew on the work of a wide range of team members across many organizations. From beginning to end, the team functioned well. Contributions were made by staff responsible for design, procurement, part inspection, component handling and transportation, cavity testing and qualification, machining and welding, string assembly, cryomodule assembly, leak checking, installation, RF power and controls, cryogenics, and testing.

    In all, more than 150 individuals at Fermilab are contributing to the LCLS-II effort, and each has reason to be proud of their work. I am very fortunate to be able to lead this team, and I’m thankful for their dedication and strong efforts.

    Just as with a good book, once you start reading you cannot put it down; the better the book, the more motivated you are to complete reading it. So it is with this project as we are now into the execution phase. We have gotten a taste of our first success and look forward to the next chapters of the story and to completing our work.

    Rich Stanek is the Fermilab LCLS-II senior team leader.

    See the full article here .

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    Fermilab Campus

    Fermi National Accelerator Laboratory (Fermilab), located just outside Batavia, Illinois, near Chicago, is a US Department of Energy national laboratory specializing in high-energy particle physics. Fermilab is America’s premier laboratory for particle physics and accelerator research, funded by the U.S. Department of Energy. Thousands of scientists from universities and laboratories around the world
    collaborate at Fermilab on experiments at the frontiers of discovery.

  • richardmitnick 11:07 am on March 16, 2017 Permalink | Reply
    Tags: Accelerator research, , , ,   

    From CERN via Accelerating News: “Progress in the interaction region magnets of HL-LHC” 

    Cern New Bloc

    Cern New Particle Event

    CERN New Masthead


    Accelerator News

    Ezio Todesco (CERN)

    Winding of the first 7.15-m-long dummy coil of the triplet quadrupole at building 180 (CERN)

    During the past months, significant advancements have been done in the development of the interaction region magnets for HL-LHC.

    In KEK, Japan, the short model of the separation dipole D1, that showed insufficient quench performance after the first test, has been disassembled. Significant movements of the coils (up to few mm) were observed in the heads, and a clear evidence of a lack of prestress in the straight part was found. The new assembly took place during winter, and a prestress increase in the straight part of about 35 MPa has been achieved. The magnet was tested in February, reaching nominal current after 2 quenches and ultimate after 5 quenches (see Figure 1). “The magnet performance is now in line with the project requirements – says T. Nakamoto, in charge of the D1 project – we will have a warm-up and cool-down to prove the magnet memory in the next weeks”. The short model design is being updated in some features of the iron yoke, and to account for an unexpected contribution to field quality from the coil heads in the strong regime of saturation. A second model will be built in the second part of 2017, and tested in 2018.

    Training of MBXFS1 in KEK: quenches (markers), nominal and ultimate current (solid lines) and short sample limit (dotted line). (Credit: HL-LHC WP3 collaboration)

    In the US, the first 4-m-long coil has been tested in a mirror configuration, reaching 85% of short sample limit. “This is the new world record for coil length in Nb3Sn accelerator magnets – says G. Ambrosio, in charge of the US contribution for the triplet – and paves the way to the assembly and test of the first 4-m-long quadrupole, to be done in the second part of the year”. At the same time at CERN the first 7.15-m-long dummy coils are being produced to validate the assembly procedures.

    Training of mirror 4-m-long coil in BNL: quenches (markers), 70% and 80% of short sample (solid lines) and short sample limit (dotted line). (Credit: HL-LHC WP3 collaboration)

    Furthermore, in CIEMAT, Madrid, the prototype for the nested orbit correctors is entering the construction phase. The concept of double collaring has been validated on a mechanical model with the final design of the collars and a dummy coil made of aluminum (see Figure 4). This is an important step of the validation of the mechanical concept of this magnet, where a mechanical lock between the horizontal and vertical dipoles is required to control the large torque. In particular, the second collaring of the outer dipole on the inner one is critical. “Both collaring operations were in line with our expectations, and we managed to insert pins without any criticality – said F. Toral from CIEMAT, in charge of the Spanish contribution for the orbit correctors – we saw some asymmetries that need more investigations, but given the complexity of the design, this is a very encouraging first step towards construction”.

    Double collaring of the nested corrector in CIEMAT

    Finally, in LASA, Milano the activity on the high order corrector prototypes is at full speed. After the successful test of the sextupole, the first decapole coil in a single coil configuration has been tested successfully. The coil reached twice the ultimate current with negligible training, thus proving the assembly procedures and tooling concepts. LASA is working in parallel on two magnets: besides the first decapole coil, eigth octupole coils have been completed and will be assembled in the first prototype, and tested in April.

    See the full article here.

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    Meet CERN in a variety of places:

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  • richardmitnick 12:03 pm on February 12, 2013 Permalink | Reply
    Tags: Accelerator research, , , , , ,   

    From Fermilab: “Science At Work” A Wonderful Video 2 Years in the Making 

    Fermilab is an enduring source of strength for the US contribution to scientific research world wide.


    This wonderful video about the D.O.E’s flagship Particle Physics lab. It was released today. I hope that you watch it and enjoy it. Please visit Fermilab’s web site and have a look around.
    These are your tax dollars at work.

    Fermilab Campus

    Fermi National Accelerator Laboratory (Fermilab), located just outside Batavia, Illinois, near Chicago, is a US Department of Energy national laboratory specializing in high-energy particle physics.

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  • richardmitnick 1:12 am on February 3, 2013 Permalink | Reply
    Tags: Accelerator research, , , , , , ,   

    From The BBC: “Prof Peter Higgs: Prize honours Large Hadron Collider scientist” 

    BBC News Scotland

    The scientist who gave his name to the Higgs boson hopes a prize named in his honour will inspire a new generation of physics geniuses.

    First Minister Alex Salmond has announced an annual prize, named after Prof Peter Higgs, for school students.

    Prof Peter Higgs standing beside the Large Hadron Collider

    Prof Higgs said: ‘I hope that this will inspire young students of today…Rewarding those who have excelled in physics in this way and supporting the next generation of scientists is to be warmly welcomed.’

    The Higgs Prize, open to Scottish school students who excel in physics, will be formally launched by the First Minister and the scientist on Tuesday.
    It is part of a week designed to showcase Scotland’s scientific expertise, with Mr Salmond also expected to make a significant announcement about life sciences and mark a landmark in space science.

    Prof Higgs hit upon his defining concept during a walk in the Cairngorms in 1964, when he started to consider the existence of a particle that gives matter its mass.

    Visitors can walk through a full-size replica of a section of the Large Hadron Collider tunnel. He wrote two scientific papers on his theory and was eventually published in the Physical Review Letters journal, sparking a 40-year hunt for the Higgs boson. In July, a team from the European nuclear research facility at CERN, Geneva, announced the detection of a particle that fitted the description of the elusive Higgs.”

    See the full article here.

    • John Jaksich 11:43 am on February 3, 2013 Permalink | Reply

      Very nice. This type of incentive is definitely needed in today’s economy.


  • richardmitnick 11:11 am on January 18, 2013 Permalink | Reply
    Tags: Accelerator research, , , , , ,   

    From SLAC: “From the Director of the Accelerator Directorate: FACET and What Comes Next” 

    SLAC Campus
    SLAC National Accelerator Laboratory is home to a two-mile linear accelerator—the longest in the world. Originally a particle physics research center, SLAC is now a multipurpose laboratory for astrophysics, photon science, accelerator and particle physics research.

    January 18, 2013
    by Norbert Holtkamp

    Norbert Holtkamp, director of the Accelerator Directorate at SLAC. (Credit: Brad Plummer)

    In mid-February, SLAC’s newest user facility, FACET – the Facility for Advanced Accelerator Experimental Tests – will launch into its startup. Approximately four weeks later, the first scientists will arrive to use FACET for a three-month run of experiments.

    FACET, the Facility for Advanced aCcelerator Experimental Tests, uses two-thirds of the famous two-mile-long linear accelerator at SLAC National Accelerator Laboratory.

    FACET will host a large variety of experiments, but its main focus is on demonstrating a new acceleration technique, known as plasma wakefield acceleration, which promises to accelerate electrons to very high energies in a much shorter distance than possible today. This would be the equivalent of shrinking SLAC’s 2-mile-long linear accelerator into a box about 3 feet long.

    An earlier experiment had already demonstrated that these steep acceleration gradients are possible. That experiment was successfully repeated last spring and achieved an acceleration gradient of 25 billion electronvolts per meter, reaching the equivalent of half the energy the SLAC linac can attain.

    But many questions remain: Is plasma wakefield acceleration efficient? Can it be done routinely and reliably? Is the beam quality good enough? Can it accelerate positively charged positrons as well as negatively charged electrons? This last question is important if we are to use this technology to build an electron-positron collider for particle physics experiments – one of many important potential applications for miniaturized accelerators in science, industry and medicine.

    A powerful international collaboration of scientists from universities and national laboratories is working on all these questions in parallel, and it is on us to deliver a high-quality electron beam, generated in the first 2 kilometers of the SLAC linac, to drive these plasma wakefield experiments.”

    See the full article here.

    SLAC is a multi-program laboratory exploring frontier questions in photon science, astrophysics, particle physics and accelerator research. Located in Menlo Park, California, SLAC is operated by Stanford University for the DOE’s Office of Science.

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  • richardmitnick 1:29 pm on January 17, 2013 Permalink | Reply
    Tags: Accelerator research, , , , ,   

    From SLAC Lab: “A Growth Spurt for X-ray Lasers” 

    January 17, 2013
    Glenn Roberts Jr.

    Four years after SLAC’s Linac Coherent Light Source opened, blazing new trails in studying ultrafast processes at the scale of atoms and molecules, the field of X-ray laser science is exploding. More than a dozen X-ray free-electron lasers, or XFELs, are now under construction or planned across the globe.

    Aerial photo of SLAC’s linac, with diagram of LCLS-II layout.

    SLAC Campus
    SLAC Campus

    Free-electron lasers, which were developed by Stanford University researchers in the 1970s, use bunches of electrons accelerated to nearly light speed to generate laser beams. They have the advantage of being highly tunable, so they can produce laser light in a wide range of wavelengths. And when tuned to produce X-rays, they are the brightest sources of X-ray light on the planet.

    XFELs have opened a new frontier in scientific exploration, allowing scientists to capture details of chemical reactions and other processes that transpire in millionths of billionths of a second. These studies have already achieved important milestones in determining protein structures, identifying the fundamental chemical processes at work in photosynthesis and unraveling mysteries in ‘superhot’ plasmas.”

    See the full article here.

    SLAC is a multi-program laboratory exploring frontier questions in photon science, astrophysics, particle physics and accelerator research. Located in Menlo Park, California, SLAC is operated by Stanford University for the DOE’s Office of Science.

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