Featured Research

from universities, journals, and other organizations

Physicists Seek To Keep Next-generation Colliders In One Piece

Date:
October 9, 2009
Source:
University of Manchester
Summary:
Researchers are investigating how to control huge electromagnetic forces that have the potential to destroy the next generation of particle accelerators.

Controlling huge electromagnetic forces that have the potential to destroy the next generation of particle accelerators is the subject of a new paper by a University of Manchester physicist.

So-called 'wake fields' occur during the process of acceleration and can cause particles to fly apart.

The particles are travelling at extremely high energies – and if they are subjected to these wake fields, they can easily destroy the accelerators.

In his paper 'Wake field Suppression in High Gradient Linacs for Lepton Linear Colliders', accelerator physicist Professor Roger Jones examines research into the suppression of these wake fields.

The challenge, he says, is finding a way to suppress wake fields sufficiently while still maintaining a high acceleration field to perform particle collisions.

Prof Jones said: "Wake fields have been carefully controlled and suppressed in the Large Hadron Collider (LHC) at CERN. However, physicists are now looking at what comes after the LHC.

"An electron-positron collider is the natural successor to the LHC and it turns out the wake fields are much more severe in these linear collider machines.

"Indeed, acceleration of particles to ultra-relativistic energies over several tens of kilometres in the proposed Compact Linear Collider (CLIC), for example, poses several significant accelerator physics challenges to designers of these immense machines.

"Beams consisting of several hundred bunches of tightly focussed charged particles can readily excite intense wake fields, forcing the bunches to fly apart."

In his conclusions, Prof Jones suggests two approaches to mitigate for the effects of these extreme wake fields.

One approach entails heavy damping, in which the majority of the wake field is sucked out of the collider by structures, known as waveguides, coupled to each cell in the accelerator.

A second approach entails light damping - in which a small portion is removed - in combination with detuning the cell frequencies of the accelerator.

Prof Jones adds: "Detuning the wake field can be understood by thinking about acoustics. If you have a collection of huge bells all ringing at slightly different frequencies or tones, the amplitude or 'wave height' of the overall sound heard will be markedly smaller than that heard if they all ring at the same tone. This method is very efficient and structures built in this manner are known as a Damped Detuned Structures (DDS).

"Detuning is perhaps more elegant than heavy damping as it also enables the position of the beam to be determined by the quantity of wake fields radiated by the beam – in this way a DDS accelerator removes the wake fields and has its own built-in diagnostic."

The DDS concept was developed by Prof Jones and colleagues during one and a half decades spent working at the SLAC National Laboratory at Stanford University in the United States.

Whilst at the University of Manchester, he has recently developed this method to apply to the CLIC 3 TeV centre of mass collider being developed at CERN. More than 143,000 of these accelerating structures will be needed for the CLIC.

Prof Jones added: "At this stage, both means of wake field suppression should be pursued in order to thoroughly assess their applicability. Experimental testing, using realistic pulse lengths and at the high gradients planned for the linear collider, will be the final test on the suitability of these techniques."

Prof Jones has undertaken research into wake field suppression over the last 20 years – the last four of which have been spent at The University of Manchester's School of Physics and Astronomy and at The Cockroft Institute of Accelerator Science and Technology, based at the Daresbury Laboratory in Cheshire..

Prof Jones' review article is due to be published online in Physical Review Special Topics - Accelerators and Beams on Monday 5 October.


Story Source:

The above story is based on materials provided by University of Manchester. Note: Materials may be edited for content and length.


Cite This Page:

University of Manchester. "Physicists Seek To Keep Next-generation Colliders In One Piece." ScienceDaily. ScienceDaily, 9 October 2009. <www.sciencedaily.com/releases/2009/10/091005111631.htm>.
University of Manchester. (2009, October 9). Physicists Seek To Keep Next-generation Colliders In One Piece. ScienceDaily. Retrieved October 21, 2014 from www.sciencedaily.com/releases/2009/10/091005111631.htm
University of Manchester. "Physicists Seek To Keep Next-generation Colliders In One Piece." ScienceDaily. www.sciencedaily.com/releases/2009/10/091005111631.htm (accessed October 21, 2014).

Share This



More Matter & Energy News

Tuesday, October 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Thanks, Marty McFly! Hoverboards Could Be Coming In 2015

Thanks, Marty McFly! Hoverboards Could Be Coming In 2015

Newsy (Oct. 21, 2014) If you've ever watched "Back to the Future Part II" and wanted to get your hands on a hoverboard, well, you might soon be in luck. Video provided by Newsy
Powered by NewsLook.com
Robots to Fly Planes Where Humans Can't

Robots to Fly Planes Where Humans Can't

Reuters - Innovations Video Online (Oct. 21, 2014) Researchers in South Korea are developing a robotic pilot that could potentially replace humans in the cockpit. Unlike drones and autopilot programs which are configured for specific aircraft, the robots' humanoid design will allow it to fly any type of plane with no additional sensors. Ben Gruber reports. Video provided by Reuters
Powered by NewsLook.com
Graphene Paint Offers Rust-Free Future

Graphene Paint Offers Rust-Free Future

Reuters - Innovations Video Online (Oct. 21, 2014) British scientists have developed a prototype graphene paint that can make coatings which are resistant to liquids, gases, and chemicals. The team says the paint could have a variety of uses, from stopping ships rusting to keeping food fresher for longer. Jim Drury reports. Video provided by Reuters
Powered by NewsLook.com
China Airlines Swanky New Plane

China Airlines Swanky New Plane

Buzz60 (Oct. 21, 2014) China Airlines debuted their new Boeing 777, and it's more like a swanky hotel bar than an airplane. Enjoy high-tea, a coffee bar, and a full service bar with cocktails and spirits, and lie-flat in your reclining seats. Sean Dowling (@SeanDowlingTV) has the details. Video provided by Buzz60
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins