Hungary-Japan Joint Muography Observatory Upgraded

The Hungary-Japan joint Muography Observatory of Sakurajima volcano (MMOS) has been upgraded with three new MWPC-based trackers by the Wigner Research Centre for Physics of the Hungarian Academy of Science and the University of Tokyo in October.  Specifically, the MMOS operates with six tracking systems and features a target sensitive surface measuring 4.5 square meters. 

Highlighted here are photographs taken in October 2018 from the Hungary-Japan Joint Muography Observatory of Sakurajima volcano. The researchers arrived after the typhoon season had passed, and there were ideal weather conditions during their stay.

The light-weight, square-meter-sized detectors are passed by each researcher from hand to hand before their installation in the tracking systems.

The precision of the cabling for the detectors is one of the most crucial tasks during installation work.

The last checks of detector signals are performed before the starting of the MMOS.

The first tracks and tracklets are captured by the upgraded MMOS.

(Photograph is flipped vertically to show the shape of the volcano shadow)

After only a few minutes, the angular dependent track distribution was rendered into the shadow of Sakurajima volcano.

The researchers from left to right: Takeshi Iwase (BBT), Dr. Gergő Hamar, Ádám László Gera, Dr. Dezső Varga (Wigner RCP) and Dr. László Oláh (UTokyo) with their target, the erupting Sakurajima volcano, have also been captured together.