2018 December 05
2018 December 11
The SuperKEKB accelerator and the Belle II detector are upgraded from the successful KEKB /Belle project. The first commissioning of SuperKEKB was done in 2016 without Belle II. Belle II was constructed separately and the roll-in was smoothly performed in April 2017. The first collision events were finally recorded in April 2018. The smaller collision spot was measured as compared with the bunch lengths of the beams. It indicates the nano-beam collision is really working.