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  • richardmitnick 10:46 am on November 15, 2013 Permalink | Reply
    Tags: , , , Fermilab ASTA   

    From Fermilab: “Cooldown of Cryomodule 2 marks major achievement in Fermilab SRF program” 


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

    Friday, Nov. 15, 2013
    No Writer Credit

    On Tuesday, Nov. 12, the Accelerator Division successfully cooled down Cryomodule 2, the first superconducting cryomodule in which all component cavities were processed and tested in the United States, to a temperature of 2 Kelvin.

    cryo
    Cryomodule 2 was successfully cooled to 2 Kelvin on Nov. 12. Photo: Reidar Hahn

    The cooldown is a major step in the laboratory’s program on superconducting radio-frequency technology, known as SRF. Nearly all proposed large-scale particle accelerators are based on SRF, and the technology has promising applications in industry, medicine and other fields of science.

    Now that CM2 is ultracold, the Accelerator Division SRF team at Fermilab can power it up and begin testing. Once testing is complete, CM2 will form an important element of Fermilab’s proposed Advanced Superconducting Test Accelerator and could be the technology of choice for upgrades to the Fermilab accelerator complex.

    CM2 contains eight so-called cavities, which look like giant metal strings of pearls, through which the particle beam travels. The higher the cavity’s gradient, the more energy the particle beam gains in a given distance. The Technical Division SRF team contributed a great deal to cavity R&D, processing and testing cavities as well as assembling the cryomodule.

    CM2 is the first cryomodule built in the United States to achieve the ambitious operating gradients required by the proposed International Linear Collider, which Japan might build. The ILC gradient goal, 31.5 megavolts per meter on average, pushes the current state of the art in SRF technology. Each of CM2’s eight cavities has exceeded that goal in tests of both bare and fully dressed cavities. The goal of the CM2 test is to validate that the high gradient can be maintained once the cavities are fully integrated into a cryomodule.

    This latest CM2 milestone is the culmination of months of effort by the entire SRF team at Fermilab. Numerous individuals and groups were involved in the cryomodule’s assembly, transport, installation and cooldown, as well as its many associated subsystems.

    “This was a significant effort that required great attention to detail and close collaboration among many groups within the lab, as well as from our collaborating partners at other laboratories,” said NML Project Engineer Jerry Leibfritz. “The safe and successful execution of this work is a testament to the dedication of all those involved.”

    Over the next several weeks, the SRF team will carry out cavity conditioning and characterization to prepare for the full-power testing of CM2.

    See the full article here.

    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 11:23 am on July 2, 2013 Permalink | Reply
    Tags: , , Fermilab ASTA   

    From Fermilab: “ASTA facility produces first electrons” 

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

    Tuesday, July 2, 2013
    Laura Dattaro

    Around 4 p.m. on June 20, spikes started appearing in data being collected at the Advanced Superconducting Test Accelerator facility. They signaled the presence of electrons, and they were lined up exactly with the timing of ultraviolet laser pulses striking the cathode of a new photoinjector gun.

    gun
    The new photoinjector gun at the Advanced Superconducting Test Accelerator recently produced its first electrons. Photo: Jerry Leibfritz, AD

    ‘We saw very clear, very distinct feedback,’ said Jerry Leibfritz, ASTA project engineer.

    The spikes were evidence of a major milestone for ASTA: The photoinjector gun had produced its first electrons, a step six years in the making. When the team was given the go-ahead to turn the machine on, Leibfritz expected it to take a few days before the first electrons were created; instead, it took only hours.

    ‘There are so many complex systems involved, and all it would take is one thing not set properly, and it wouldn’t work,’ Leibfritz said. ‘The fact that it worked so quickly is really a testament to everyone’s hard work and attention to detail. We were quite thrilled. It’s a big deal because you can’t run an accelerator unless you can generate a beam.’

    ASTA will use superconducting radio-frequency technology to accelerate electrons down a 140-meter linear tunnel and into a beam dump. SRF allows for highly efficient particle accelerators, achieving more beam acceleration in shorter distances.”

    See the full article here.

    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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