Nuclear and Particle Physics Facility
J. Imazato
Nuclear and Particle Physics Group leader
IPNS, KEK
March 10, 2003

Progress in 2002 andcurrent status of facility design■ Introduction to:■Hadron beam hall : Prof. K.-H.Tanaka
Neutrino facility : Prof. K. Nishikawa

Accelerator com plex

50 GeV PS
Experimental Area

Phase 1
3 GeV PS(25Hz)

Phase 2
R&D for Nuclear
Transmutation

3 GeV PS
Experimental Area

Linac(Superconducting)
50 GeV PS

Linac(Normal Conducting)
Neutrinos toSuperKamiokandeProton bea m( Design parameters at the beginning)

α : relative bea m power of RCS due to 200 MeV linac operation■

Fast extraction (ν facility)
energy40 GeV40 GeVharm.
918 *)

bunchT83.53s15 *)3.26s

current
15µA
30α µApower0.6 MW
1.22α MW( 0.73M W for α=0.6)■

Slow extraction (K‑hall)
30 GeV **) 930 GeV18 *)815 *)

3.53s
15µA
3.96s
25.2α µ

D.F.***)=
0.45 MW0.20
0.20
0.75α M W*) these operations have influence on neutron intensity.
**) proton energy is limited by electricity and cooling water capacityof the NP facility in Phase1.
***)duty factor can be larger depending on flat‑top length at 30 GeV.

Progress in 2002■

Hadron Hall (K‑Hall)– A detailed design of buildings and civil engineering:• Based on conceptual design by the KEK construction department.
• Ordered to an outside co mpany and will be delivered soon.
• Realistic cost estimate will follow.

– R & D of bea m line elem ents:• T1 water‑cooled rotating target.
• Bea m du mp with water‑cooled Cu blocks.
• Bea m m onitors■

Neutrino Facility– A design of the tunnel, target station, decay volum e etc.
– A study of proton bea m line using combined SC magnets.
– R & D of a water‑cooled carbon‑rod target, etc.
– Fabrication of a part of decay volum e.

Experimental halllayout■ Apossible option of bea mline layout in Phase1■Shielding design• possible to acco m m odate all the requested bea m lines• but not at the same timeConstruction schedule (K‑Hall)(realistic estimate after the archeology study)
JFY2003

2004

2005

2006

2007

Start of equipment budget
Start of construction budget

S witch yardtunnel

Archeology

Exp.hall
Entrance Bldg.
S witch yard
Bea m line
Exp. Hall
Bea m line

Start of magnet installation

Ready to accept bea mz Buildings will be co mpleted by the end of JFY2005.
z So metime in FY2004 magnet shipping from the KEK 12‑GeV P S will start.
z Ho w to shorten the bea mline installation period is now under discussion.

N P02 workshop■

International W orkshop on Nuclear and Particle Physics at
50 Ge V‑PS (NP02) : (Sep.27‑29 at Kyoto University)– with about 200 participants (including 80 people from abroad)■Five working sessions of:
–––––

■

Neutrino experim ents
Kaon rare decay experim ents
M uon rare decay experim ents
Strangeness nuclear physics experiments
Nuclear/hadron physics experim ents

Bea mline de m and in Phase1 for: ( in addition to a neutrino beam)––––

M edium p separate kaon bea m for hypernuclear experiments
Low p separate kaon bea m for stopped bea m experiments
Neutral K L beam for a rare decay experimentPrimary beams for nuclear/hadron experiments

Letter of Intent■■

Announce of LoI call: July 2002
Thirty LoI’s were sub mitted by the end of Dece mber 2002 :––––––■

Strangeness nuclear physics
Nuclear/hadron physics
Kaon decay physics
M uon physics
Neutrino physics
Future facilities

77
5317

M ore than 450 authors
from all over the world.
Japan ■
Asia ■
North Am erica ■Europe ■NPF LOI Authors

Experimental Facility Co m mittee■

Nuclear / Particle Physics Facility Co m m ittee (pre‑PAC) wasformed.
– the first meeting is scheduled on March 22.

■

The task of the co m mittee will be:z Advice on facility constructionz Advice on beamline installationz Approval of Day‑1 experiments■The issues in the first meeting will be:z the mechanism how to evaluate LoI’sz concept of the facility designz hearing of the neutrino facility proposal■

The second meeting will be in late spring.

Co m mittee m e m bers■

Co m mittee mem bers including three from abroad are:Taku Yamanaka(Osaka Univ)
Takayoshi Ohshima (Nagoya Univ)
Takaaki Kajita(Univ of Tokyo)
Kenichi Imai(Kyoto Univ)
Hideto En'yo(RIKEN)
Daniel R. Marlow(Princeton Univ)
Jen-Chieh Peng(Univ of Illinois)
Jacques Arvieux(IPN-Orsay)
High energy physics : 4
Nuclear physics : 4
Particle and nuclear theory : 2
Project tea m : 6

Makoto Oka(Tokyo Inst Tech)
Yasuhiro Okada(KEK)
Jun Imazato(KEK)Yoshishige Yamazaki (JAERI)
Tomofumi Nagae(KEK)
Kazuhiro Tanaka(KEK)
Takashi Kobayashi(KEK)
Koji Yoshimura(KEK)Miscellaneous■

KEK IPN S Research Planning Com mittee worked out 50 GeV‑PS physics
in detail and sub mitted a report to the IPN S director.
– KEK Report 2002‑11 (January 2003) [in Japanese]■Users Association will be formed soon based on the LoI author list.
– About 450 people■W e are thankful to SLA C, CER N, CE A(Saturne) for delivering usedm agnets.
– M ore fro m LA N L and BNL?

■The schedule of magnet shipping from the KEK 12‑GeV PS is now underdiscussion.

Su m m ary■ Design of the facility and R & D of bea m elements are goingon further in 2003.
■ Construction budget for NP hall will start in FY2003 for civilengineering and buildings, and in FY2004 for equipments.
■ We will do our best to co m plete the K hall facility by the endof FY2006+α with α <12 months.

■ However, no budget yet for experiments.
■ Hopefully the budget for the neutrino facility will be approved

this year.