Status of J-PARC K1.8 Beam Line

Kiyoshi Tanida

doi:10.1051/epjconf/20122005003

Abstract

The commissioning of the K1.8 beam line in the hadron hall of J-PARC has been going very well. In November 2011, the first physics data was taken for E19 experiment, which is the day-one experiment in the hadron hall of J-PARC. A preliminary result of E19 exhibits no peak for pentaquark Θ + around 1540 MeV.

Highlights

J-PARC (Japan Proton Accelerator Research Complex) is an accelerator complex constructed in Tokai, Japan (Fig. 1), and provides world strongest proton beam of an order of 1 MW up to 50 GeV
Most of the nuclear and particle physics experiments are performed in the Hadron Hall (Hadron Experimental Area as shown in top-right corner of Fig. 1)
A notable feature is that a high-purity kaon beams can be obtained with high intensity thanks to the double electrostatic separators

Summary

Overview of J-PARC

J-PARC (Japan Proton Accelerator Research Complex) is an accelerator complex constructed in Tokai, Japan (Fig. 1), and provides world strongest proton beam of an order of 1 MW up to 50 GeV. Variety of researches, such as protein crystallography, transmutation of nuclear wastes, as well as nuclear and particle physics are planned. Most of the nuclear and particle physics experiments are performed in the Hadron Hall (Hadron Experimental Area as shown in top-right corner of Fig. 1). In the Hadron Hall, among the 6 beam lines (see Fig. 2) planned to be constructed, 4 of them (K1.8, K1.8BR, K1.1BR, and KL) are available

50 GeV PS

E10 E13 E18

E19 experiment

Findings

Summary