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AWAKE


ADVANCED WAKEFIELD EXPERIMENT

 

CERN release, 27th of July 2023


AWAKE INTRODUCES A STRONGER WAVE TO ACCELERATE PARTICLES

Plasma accelerator AWAKE has tested scalability and is all set to begin its
second phase of data taking with an upgraded plasma source

https://home.cern/news/news/accelerators/awake-introduces-stronger-wave-accelerate-particles

 

 

CERN press release, 29th of August 2018 

Update 19th of September: AWAKE's article, referring to the corresponding
paper, is available in Nature's September 19th 2018 issue (VOL 561 | NATURE |
pages 318-319).

 


AWAKE ACHIEVES FIRST EVER ACCELERATION OF ELECTRONS IN A PROTON-DRIVEN PLASMA
WAVE

 

In a paper published today in the journal Nature, the AWAKE collaboration at
CERN reports the first ever successful acceleration of electrons using a wave
generated by protons zipping through a plasma. The acceleration obtained over a
given distance is already several times higher than that of conventional
technologies currently available for particle accelerators. First proposed in
the 1970s, the use of plasma waves (or so called wakefields) has the potential
to drastically reduce the size of accelerators in the next several decades.

On 26 May, the AWAKE collaboration successfully accelerated witness-electrons
for the first time. Electrons injected into AWAKE at relatively low energies of
around 19 MeV (million electronvolts), “rode” the plasma wave, and were
accelerated by a factor of around 100, to an energy of almost 2 GeV (billion
electronvolts) over a length of 10 metres.

While previous experiments of wakefield acceleration have relied on using
electrons or lasers to drive the wake, AWAKE is the first to use protons. “Drive
beams of protons penetrate deeper into the plasma than drive beams of electrons
and lasers,” said Allen Caldwell, Spokesperson of the AWAKE collaboration.
“Therefore, wakefield accelerators relying on protons for their drive beams can
accelerate electrons for a greater distance, consequently allowing them to
attain higher energies.”

By accelerating electrons to 2 GeV in just 10 metres, AWAKE has demonstrated
that it can achieve an average gradient of around 200 MV/m (million volts per
metre),” says Technical Coordinator and CERN Project Leader for AWAKE, Edda
Gschwendtner. For comparison, the advanced conventional technologies considered
for the next generation of electron accelerators promise gradients in the range
of 30–100 MV/m. These represent today’s state of the art in particle
accelerators for the overall distance over which acceleration can be sustained,
on the one hand, and the intensity and quality of accelerated beams, on the
other – two important factors required for high-energy physics experiments. The
next steps of AWAKE, which aims to achieve 1000 MV/m, include addressing these
additional requirements.

 

Additional information: 

Interview with Edda Gschwendtner, CERN Project Leader for AWAKE (2018)

AWAKE video 360 (2018)

Surfing wakefields to create smaller accelerators (2015) by Edda Gschwendtner at
TEDxCERN

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