First signals from CALET on a ISS

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Five days after it launched from a Tanegashima Space Center on house a HTV-5 Transport Module, operated by a Japan Aerospace Exploration Agency (JAXA), a CALorimetric Electron Telescope (CALET) docked during a International Space Station (ISS). The instrument, now in a check-out phase, is promulgation a initial signals behind from a Space Station.

After berthing with a ISS, CALET is to be extracted by robotic arm from a Japanese H-II send car (left, with Japanese flag) and commissioned on a Japanese Experiment Module (right) where it will start a initial data-taking (Image: NASA/JAXA)

After berthing with a ISS, CALET is to be extracted by robotic arm from a Japanese H-II send car (left, with Japanese flag) and commissioned on a Japanese Experiment Module (right) where it will start a initial data-taking (Image: NASA/JAXA)

CALET is a space goal lead by JAXA with a appearance of a Italian Space Agency (ASI) and NASA. It is a CERN famous examination and a second high-energy astroparticle examination to be commissioned on a ISS after AMS-02, that is holding information from a remote hire given 2011. Designed as a space look-out for long-term observations of vast flaw aboard a outmost height JEM-EF of a Japanese procedure (KIBO) on a ISS, CALET aims during identifying electrons, nuclei and gamma-rays entrance from space and magnitude their energies with high-resolution.

“One of a categorical systematic objectives of CALET is to magnitude a minute figure of a nucleus spectrum above 1 TeV,” says Shoji Torii of Waseda University in Tokyo, Principal Investigator (PI) of  CALET. “This unexplored segment is gaining a flourishing seductiveness by a systematic village as it competence be means to uncover for a initial time a smoking gun of a participation of circuitously astronomical source(s) where electrons are accelerated. We know that electrons can't transport for prolonged distances as they fast remove their energy. Therefore, they are approaching to issue comparatively nearby to Earth – about 1 Kpc.”

CALET will perform accurate measurements of a nucleus appetite spectrum from 1 GeV to 20 TeV. “The high finish of a spectrum could be quite engaging as it could assistance solve a argumentative interpretation of a nucleus and atom spectra totalled by AMS-02 and could yield a idea on probable signatures of dim matter,” says John Wefel of Louisiana State University, Co-PI of a CALET plan and lead of a American group participating in CALET.

CALET could also assistance explain a flaw from a pristine power-law that was recently celebrated by a AMS-02 partnership in a appetite spectra of light nuclei. “Thanks to a glorious appetite fortitude and ability to brand vast nuclei from hydrogen to iron and above,” says Pier Simone Marrocchesi, Co-PI of a CALET partnership and conduct of a Italian team. “CALET will be means to extend a benefaction information to aloft energies and magnitude accurately a span of a spectrum and a position of a bright break-point for particular chief species. The calibration of a dual calorimetric instruments is a pivotal to control a appetite scale and this is because we achieved several calibration tests during CERN.”

After berthing with a ISS, CALET will be extracted by a robotic arm from a Japanese H-II send car (HTV5) and commissioned on a JEM-EF where it will start a initial data-taking duration of 5 years.

Source: CERN