A Superconducting Proton/Electron Linac
Download
1 / 14

R. Belusevic - PowerPoint PPT Presentation


  • 69 Views
  • Uploaded on

A Superconducting Proton/Electron Linac for Fixed-Target Experiments at KEK. R. Belusevic. KEK, July 2014. Main characteristics of the proposed facility. Pulsed SC linac based on ILC-type cavities and rf sources, constructed using the existing KEK accelerator infrastructure.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' R. Belusevic' - lesley-good


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
R belusevic

A Superconducting Proton/Electron Linac

for Fixed-Target Experiments at KEK

R. Belusevic

KEK, July 2014


Main characteristics of the proposed facility
Main characteristics of the proposed facility

Pulsed SC linac based on ILC-typecavities and rf sources,

constructed using the existing KEK accelerator infrastructure.

Both protons and (polarized) electrons can be accelerated,

which considerably increases its physics potential.

By avoiding the use of circular machines, the beam power can exceed 10 MW at a linac beam energy of ~20 GeV.

At a later stage, a 120-GeV proton synchrotron could be

installed inside the Tristan ring.



R belusevic

KEK site with Tristan ring and electron linacs

Existing linac: blue

Extended tunnels: red



Measured accelerating gradients of 200 ilc type cavities 2 pass
Measured accelerating gradients of~200 ILC-type cavities (2. pass)

Because of large ohmic losses, accelerating gradients in a CW linac are limited

to about 15 MV/m. A pulsed ILC-type linac would therefore be a factor of two

shorter – and cheaper – than a CW linac with the same beam energy!



R belusevic

Proton beam power

Power[MW]=E [MV]xI [A]xt [s]xR [Hz]

Based on the parameters of the SC linac (see the previous page),

Power =20,000 MV x 16.5 mA x 1.5 ms x 20 Hz = 10 MW

N = P/E- number of protons per second

Np = N/R - number of protons per pulse

I = (Np x 1.6 x 10 C)/ t-current per pulse

-19






R belusevic

Optimum beam power for a given kaon yield

The beam power required for a given kaon yield would be lowest at energies

between 40 and 100 GeV.


R belusevic

Concluding remarks

The proposed facility would be a versatile source of high-intensity

proton and electron beams with energies of ~20 GeV;

the maximum beam power of the linac could exceed 10 MW.

The facility would be built using the existing KEK accelerator

infrastructure and J-PARC beam lines.

Neutrino and antineutrino beams produced at the proposed 10MW “proton driver” would yield, within 2 years of data taking, more than

10,000 electron neutrino “appearance events” in the 0.5Mt fiducial

volume of the Hyper-Kamiokande detector.

At a later stage, a 120-GeV proton synchrotron could be installed

inside the Tristan ring in order to produce high-energy neutrino and

kaon beams.


ad