1Welcome to KEKKEKB Review Com
040216
Y.Totsuka

KEKB review com

2153haKEKB collid
2.5GeV PF
K2K bea
6.5GeV PF-ARmlineerBELLE experi

menneutron, muon facilitieseLCAIN

Proton Synchrotron

Computer center

KEKB review comt

J-PARC (Joint project with JAERI)SC
3GeV R

onirect

ν di

KEKB review com

As of Dec 2003

K-arenaNM-labAC

LIN
400MeV

3R

VM
50Ge

 The record peak luminosity of 1034 /cm2/s was citedby many newspapers.
 Now an equally important step, the continuousinjection has started for normal runs. This will
significantly increase the integrated luminosity.
Feb 15 2004

KEKB review com

4

5

 There are two frontiers that we confront for thefuture development of accelerators:
 Energy frontier
 Proton-proton collider, LHC with the CMS energy of 14 TeV
 Linear collider with the phase-1 CMS energy 500 GeV
upgraded to >1 TeV in the phase 2.
 A problem is that there is not, as long as I know, a clear
image of what kind of accelerators are needed and should
be built beyond LHC and LC.
 Another problem is that there are few immediate
applications of energy-frontier accelerators to industry andsociety. It would be easier, if you find some applications, toconvince tax payers about the importance of energy-frontieraccelerators.

KEKB review com

6

 Intensity frontier Electron-positron colliders, KEKB and PEP II with luminosityof about 1034 /cm2/s
 Proton accelerators, J-PARC and SNS with beam power ofabout 1 MW
 Clear plans in immediate future: A Super B-factory with luminosity of about 1036 /cm2/s
aiming at studies of new physics buried in higher orderphenomena
 Internationalize the effort like the LC project: a close
collaboration between KEKB and PEP II and others

KEKB review com

Activities towards luminosity upgradeCrab crossing may boost the beam-beam parameter up to 0.2!
(Strong-weak simulation)

ξyK. Ohmi

Head-on(crab)◊◊ 5 M$◊
Allocated aboutfor the crab cavity R&D◊
crossing angle 22 mrad◊and construction in FY2004(Strong-strong simulation)

Superconducting crab cavities
are under development, will be
installed in KEKB in 2005.
Input Coupler
I.D. 240

I.R. 90

I.D. 120

I.D. 188

Coaxial Coupler

I.R.241.5

866

I.R. 20
I.D. 30
Monitor Port

010050150483

scale (cm)KEKB review com

K. Hosoyama, et al78This year Oide sent us a 450 M$ budget proposal
for Super-KEKB which is not compatible withthis figure!!

By Oide, July 2003
KEKB review com

9 Proton drivers of several MW for a neutrino factory andeventually for a muon storage ring
 Applications are possible: Light sources for material and life sciences
 Spallation neutrons and pulsed muons for material andlife sciences
 Transmutation of radioactive nuclear wastes, ADSKEKB review com

10

 To which direction a lab must go, energy frontier or
intensity frontier or both, is a difficult question.
 We support the luminosity upgrade of the KEKB
machine within the available resources.
 The realization of a LC is being pursued world-widevery actively and very rapidly especially this year.
 KEK is one of the proponents of the LC.
 Considering KEK’s current budget scale, it is notpossible for KEK to host both LC and Super-B.

KEKB review com

11 For the time being it is one of our highest priorities
to increase the luminosity delivered by KEKB to thelimit, within the available resources.
 Your comments and suggestions are greatlyappreciated.

KEKB review com