Chronology
- Apr. 1983
- Kamioka Underground Observatory was established.
- Jul. 1983
- Kamiokande experiment started observation.
- 1985
- Kamiokande denied the simplest GUT as a result of proton decay search.
- Feb. 1987
- Kamiokande succeeded in detecting neutrinos from a supernova explosion.
- 1988
- Kamiokande observed a solar neutrino deficit.
- Dec. 1991
- The construction of Super-Kamiokande （SK） was started.
- Jan. 1994
- The construction of a computer building was completed.
- Jun. 1994
- The excavation for the SK detector was finished.
- Apr. 1995
- Kamioka Observatory which belongs to the Institute for Cosmic Ray Research(ICRR), was established.
- Apr. 1996
- SK experiment started observation.
- Jun. 1998
- SK discovered the atmospheric neutrino oscillation.
- Jun. 1999
- The long baseline neutrino oscillation experiment; K2K started.
- Jun. 2001
- SK discovered the solar neutrino oscillation.
- Jul. 2001
- SK started replacement of several hundred nonfunctional PMTs.
- Nov. 2001
- After replacement work, half of the PMTs were destroyed by a chain reaction
- Dec. 2002
- The Nobel prize in Physics was awarded to Professor Koshiba as a consequence of the major scientific results obtained at Kamiokande.
- Dec. 2002
- SK started observation with about 5200 inner detector PMTs.
- Jun. 2004
- K2K experiment confirmed the neutrino oscillation.
- Nov. 2004
- K2K experiment was finished.
- Oct. 2005
- The new PMTs were almost ready, the full reconstruction work began.
- Jul. 2006
- SK started observation with full complement of PMTs.
- Sep. 2008
- The new data acquisition system of SK was installed.
- Oct. 2008
- XMASS experiment started to construct the water shield tank.
- Apr. 2009
- The T2K experiment was started, the first off-axis neutrino oscillation experiment.
- Oct. 2009
- XMASS experiment started the commissioning run.
- Nov. 2009
- Proton decay lifetime limit published by SK exceeds 1034 years.
- Mar. 2011
- T2K was temporarily stopped by the Great East Japan Earthquake
- Jun. 2011
- Discovery of electron neutrino appearance in the T2K experiment
- Jul. 2013
- Measurement of electron neutrino appearance in the T2K experiment.
- Mar. 2014
- First indication of a difference between the solar neutrino flux during the night and day
- Nov. 2015
- 2016 Breakthrough Prize in Fundamental Physics awarded to Prof. Y. Suzuki, Prof. T. Kajita and SK Collaborators, and Prof. K. Nishikawa and K2K/T2K Collaborators.
- Dec. 2015
- The 2015 Nobel Prize in Physics awarded Prof. Takaaki Kajita.
- Jul. 2016
- The T2K experiment represented the first CP violation search result.
- Aug. 2017
- The T2K experiment represented the indicate of CP violation by neutrinos at 95%.
- Jun. 2018
- SK started the upgrade work.
- Jan. 2019
- SK restarted the observation.
- Feb. 2019
- XMASS completed the data acquisition.
- Feb. 2020
- The construction of Hyper-Kamiokande (HK) was started.
- Apr. 2020
- T2K resulted restrict possible values of neutrino CP phase.
- Aug. 2020
- Introduction of Gadolinium into Super-Kamiokande and the start of new observations.
- May 2021
- The access tunnel excavation for Hyper-Kamiokande started and the groundbreaking ceremony held.
Inside of the Kamiokande detector
Completion of excavation a large cavity for SK.
Inside the detector during filling water.
The first operation of SK at 0:00 AM April 1st, 1996, which was started by the spokesperson, Prof. Yoji Totsuka.
Inside of the detector with a half density of PMTs.
Inside of the detector with full density of PMTs. All PMTs are covered with acrylic cases.
The XMASS detector with all PMTs mounted.
The candidate event display of the electron appearance discovered in the T2K experiment.
Super-Kamiokande upgrade work in 2018.
The access tunnel entrance of Hyper-Kamiokande.