Gadget in-extremis: CERN fires up new linear accelerator for LHC - Electronics Weekly

Linac 4 is the newest accelerator to join CERN’s complex, and a three-week machine-development run lasted until mid-August.

It saw low-energy beams of negative hydrogen ions (H−) fly through the first part of the accelerator for the first time since it was connected to the PS Booster, said Cern.

“On 20 August, the first beams at the nominal energy of 160 MeV were accelerated through the entire machine and into a dedicated beam dump located at the end of the linac,” reports Cern.

Over the coming months, it says, Linac 4 will finish being commissioned and will be made ready to deliver various beams to the PS Booster in December.

“ABP made sure that we could send beam through the first structure in Linac 4, the so-called radio-frequency quadrupole or RFQ, with low beam losses,” said Bettina Mikulec, team lead from the Operations group which is responsible for Linac 4 and the PS Booster as well.

“With Linac 4, we can adjust additional parameters of the beam so we can feed the Booster in a loss-free process. We can also adapt the energy spread of the beams to match the Booster’s acceptance, whereas with Linac 2 one practically only adjusted the length of the beam before injection.”

The newer accelerator will inject particles into the PS Booster at an energy of 160 MeV, says Cern, which is significantly higher than the 50-MeV operation of Linac 2.

This enables the Booster to inject beams at an energy of 2 GeV into the Proton Synchrotron (PS), higher than the previous value of 1.4 GeV.

You can read more about the latest development on the Cern site, or view this video below.

Image: Andrew Hara/CERN

[Via New Atlas]

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