High Energy Accelerator Research Organization, a Joint Usage/Research Organization of Universities

1954: Establishment Preparatory Committee for the Nuclear Research Institute

Formation of a working group for the foundation of an institute for nuclear study.

1955: Establishment of the University of Tokyo Nuclear Research Institute

The Institute of Nuclear Study (INS) was established.

1957: September: Completion of FF Cyclotron

September : FF cyclotron was completed.

1958: May: Completion of FM Cyclotron; June: Commencement of FF Cyclotron Joint Use Experiments

May : FM cyclotron was completed.

June : The first experiment with the FF cyclotron took place.

1960: October: Commencement of FM Cyclotron Joint Use Experiments

October : The first experiment with the FM cyclotron took place.

1961: December: Successful acceleration up to 750 MeV with Electron Synchrotron (ES)

December : The Electron Synchrotron (ES) accelerated an electron beam to 750 MeV.

1963: April: Start of ES Joint Use Experiments

April : The first experiment with the ES took place.

1964: April: Establishment of Particle Physics Research Institute Preparation Office

Apr: Formation of a working group for the foundation of a new research institute for elementary particle physics.

1966: March: Successful enhancement of ES energy to 1.3 GeV

Mar: The ES produced a 1.3 GeV beam.

1971: Establishment of High Energy Physics Research Institute

Apr: National Laboratory for High Energy Physics (KEK) was established.

1976: March: Successful acceleration up to 8 GeV with Proton Synchrotron (PS)

Mar: The proton synchrotron (PS) produced an 8 GeV beam as designed.

1976: December: Successful acceleration up to 12 GeV with PS

Dec: The PS achieved 12 GeV.

1977: May: Commencement of PS Joint Use Experiments

May: The first PS experiment took place.

1977: December: Commencement of SF Cyclotron Joint Use Experiments

Dec: Experiments with the SF cyclotron began.

The Booster Synchrotron Utilization Facility and a Photon Factory (PF) were founded.

The Meson Science Facility was established.

1978: Establishment of New Booster Facility; Establishment of Synchrotron Radiation Facility (PF); Establishment of Meson Science Experiment Facility as an affiliated facility of the University of Tokyo Faculty of Science

Showa 55 (1980): July: Initiation of joint utilization experiments of booster facilities

Jul: Experiments in the Booster Synchrotron Utilization Facility began.

Showa 57 (1982): March: Successful accumulation of electrons at 2.5 GeV in PF

Mar: The PF succeeded in storing a 2.5 GeV electron beam.

Showa 58 (1983): June: Start of joint utilization experiments of PF

Jun: PF Experiments began.

Showa 59 (1984): July: Successful acceleration of electrons to 6.5 GeV in the Tristan injection storage ring (AR)

Jul: The TRISTAN Accumulation Ring (AR) accelerated an electron beam to 6.5 GeV.

Showa 60 (1985): October: Successful acceleration of positrons to 5.0 GeV in the Tristan injection storage ring

Oct: The AR accelerated a positron beam to 5 GeV.

Showa 61 (1986): November: Successful acceleration of electrons and positrons to 25.5 GeV in the Tristan main ring (MR)

Nov: The TRISTAN Main Ring (MR) accelerated both electron and positron beams to 25.5 GeV.

Showa 62 (1987): May: Start of joint utilization experiments of Tristan

May: TRISTAN experiments began.

Showa 63 (1988): April: The Meson Science Experimental Facility was reorganized into the Meson Science Research Center

Apr: The Meson Science Facility was reorganized as a Laboratory (MSL).

Showa 63 (1988): November: Successful acceleration of electrons and positrons to 30 GeV using Tristan superconducting accelerating cavities

Nov: The MR energy was upgraded to 30 GeV with the help of superconducting accelerating cavities.

Heisei 1 (1989): Establishment of the Graduate University for Advanced Studies' Accelerator Science and Synchrotron Radiation Science majors: September: Successful electron cooling at TARNII

Sep: First electron cooling by TARNII.

Heisei 5 (1993): March: Completion of high-resolution online mass separator

Mar: Isotope Separator On-Line (ISOL) was completed.

Heisei 6 (1994): June: Start of B-factory construction

Jun: KEKB B-factory construction began.

Heisei 7 (1995): December: End of Tristan MR operation

Dec: TRISTAN experiments finished.

The High Energy Accelerator Research Organization was established.

Heisei 9 (1997): April: Merged and reorganized the Institute for Nuclear Study at the University of Tokyo and the Meson Science Research Center to establish the High Energy Accelerator Research Organization: April: Establishment of the Tanashi branch of the High Energy Accelerator Research Organization

First beam storage at KEKB (KEK B-factory) ring.

Heisei 10 (1998): December: Successful accumulation of B-factory beams

Heisei 11 (1999): April: Establishment of the Graduate University for Advanced Studies' Particle and Nuclear Physics major

The Department of Particle and Nuclear Science was founded in the Graduate University for Advanced Studies.

Heisei 11 (1999): May: Start of the long-baseline neutrino oscillation experiment (K2K experiment)

The Long-baseline Neutrino Oscillation experiment (K2K) began.

Heisei 11 (1999): June: Start of the Belle experiment at the B-factory

The Belle experiment at the KEK B-factory began operation.

Tanashi Branch closed

Construction of High Intensity Proton Accelerators (J-PARC) started

Heisei 13 (2001): March: Transfer of the Tanashi branch to Tsukuba: Start of construction of the high-intensity proton accelerator

Heisei 16 (2004): April: Establishment of the High Energy Accelerator Research Organization as a joint-use national university corporation

Became the Inter-University Research Institute Corporation High Energy Accelerator Research Organization.

2004 : November : K2K experiment concluded

K2K experiment ended

2005 : April : Establishment of Tokai Campus

Tokaï Campus was opened.

2005 : December : Completion of joint utilization experiment with PS (12 GeV)

Experiments at PS ended.

2006 : February : Establishment of J-PARC Center jointly with Japan Atomic Energy Agency

J-PARC Center was established.

2006 : March : Completion of joint utilization experiment of booster facility

Experiments at BSF ended.

2007 : January : Achieved initial performance of 181 MeV for J-PARC linear accelerator

181MeV proton beam at J-PARC Linac

2007 : October : Achieved initial performance of 3 GeV for J-PARC 3 GeV synchrotron

3 GeV proton beam at J-PARC Rapid Cycling Synchrotron (RCS)

2008 : Nobel Prize in Physics awarded to Professor Makoto Kobayashi (former director of the Institute for Particle and Nuclear Research)

Prof. Makoto Kobayashi, former director of IPNS, won the 2008 Nobel Prize in Physics.

2009 : Completion of J-PARC jointly constructed with Japan Atomic Energy Agency

J-PARC construction was completed.

2010 : June : Belle experiment concluded

The Belle experiment ended

2011 : Construction of SuperKEKB started

Construction of the SuperKEKB started

2016 : Phase 1 of SuperKEKB project launched

Phase 1 operation of the SuperKEKB started