Precision Measurement of the Helium Flux in Primary Cosmic Rays of Rigidities 1.9 GV to 3 TV with the Alpha Magnetic Spectrometer on the International Space Station.

نویسندگان

  • M Aguilar
  • D Aisa
  • B Alpat
  • A Alvino
  • G Ambrosi
  • K Andeen
  • L Arruda
  • N Attig
  • P Azzarello
  • A Bachlechner
  • F Barao
  • A Barrau
  • L Barrin
  • A Bartoloni
  • L Basara
  • M Battarbee
  • R Battiston
  • J Bazo
  • U Becker
  • M Behlmann
  • B Beischer
  • J Berdugo
  • B Bertucci
  • V Bindi
  • S Bizzaglia
  • M Bizzarri
  • G Boella
  • W de Boer
  • K Bollweg
  • V Bonnivard
  • B Borgia
  • S Borsini
  • M J Boschini
  • M Bourquin
  • J Burger
  • F Cadoux
  • X D Cai
  • M Capell
  • S Caroff
  • J Casaus
  • G Castellini
  • I Cernuda
  • D Cerreta
  • F Cervelli
  • M J Chae
  • Y H Chang
  • A I Chen
  • G M Chen
  • H Chen
  • H S Chen
  • L Cheng
  • H Y Chou
  • E Choumilov
  • V Choutko
  • C H Chung
  • C Clark
  • R Clavero
  • G Coignet
  • C Consolandi
  • A Contin
  • C Corti
  • E Cortina Gil
  • B Coste
  • W Creus
  • M Crispoltoni
  • Z Cui
  • Y M Dai
  • C Delgado
  • S Della Torre
  • M B Demirköz
  • L Derome
  • S Di Falco
  • L Di Masso
  • F Dimiccoli
  • C Díaz
  • P von Doetinchem
  • F Donnini
  • M Duranti
  • D D'Urso
  • A Egorov
  • A Eline
  • F J Eppling
  • T Eronen
  • Y Y Fan
  • L Farnesini
  • J Feng
  • E Fiandrini
  • A Fiasson
  • E Finch
  • P Fisher
  • V Formato
  • Y Galaktionov
  • G Gallucci
  • B García
  • R García-López
  • C Gargiulo
  • H Gast
  • I Gebauer
  • M Gervasi
  • A Ghelfi
  • F Giovacchini
  • P Goglov
  • J Gong
  • C Goy
  • V Grabski
  • D Grandi
  • M Graziani
  • C Guandalini
  • I Guerri
  • K H Guo
  • D Haas
  • M Habiby
  • S Haino
  • K C Han
  • Z H He
  • M Heil
  • J Hoffman
  • T H Hsieh
  • Z C Huang
  • C Huh
  • M Incagli
  • M Ionica
  • W Y Jang
  • H Jinchi
  • K Kanishev
  • G N Kim
  • K S Kim
  • Th Kirn
  • M A Korkmaz
  • R Kossakowski
  • O Kounina
  • A Kounine
  • V Koutsenko
  • M S Krafczyk
  • G La Vacca
  • E Laudi
  • G Laurenti
  • I Lazzizzera
  • A Lebedev
  • H T Lee
  • S C Lee
  • C Leluc
  • H L Li
  • J Q Li
  • J Q Li
  • Q Li
  • Q Li
  • T X Li
  • W Li
  • Y Li
  • Z H Li
  • Z Y Li
  • S Lim
  • C H Lin
  • P Lipari
  • T Lippert
  • D Liu
  • H Liu
  • Hu Liu
  • M Lolli
  • T Lomtadze
  • M J Lu
  • S Q Lu
  • Y S Lu
  • K Luebelsmeyer
  • F Luo
  • J Z Luo
  • S S Lv
  • R Majka
  • C Mañá
  • J Marín
  • T Martin
  • G Martínez
  • N Masi
  • D Maurin
  • A Menchaca-Rocha
  • Q Meng
  • D C Mo
  • L Morescalchi
  • P Mott
  • M Müller
  • T Nelson
  • J Q Ni
  • N Nikonov
  • F Nozzoli
  • P Nunes
  • A Obermeier
  • A Oliva
  • M Orcinha
  • F Palmonari
  • C Palomares
  • M Paniccia
  • A Papi
  • M Pauluzzi
  • E Pedreschi
  • S Pensotti
  • R Pereira
  • N Picot-Clemente
  • F Pilo
  • A Piluso
  • C Pizzolotto
  • V Plyaskin
  • M Pohl
  • V Poireau
  • A Putze
  • L Quadrani
  • X M Qi
  • X Qin
  • Z Y Qu
  • T Räihä
  • P G Rancoita
  • D Rapin
  • J S Ricol
  • I Rodríguez
  • S Rosier-Lees
  • A Rozhkov
  • D Rozza
  • R Sagdeev
  • J Sandweiss
  • P Saouter
  • S Schael
  • S M Schmidt
  • A Schulz von Dratzig
  • G Schwering
  • G Scolieri
  • E S Seo
  • B S Shan
  • Y H Shan
  • J Y Shi
  • X Y Shi
  • Y M Shi
  • T Siedenburg
  • D Son
  • J W Song
  • F Spada
  • F Spinella
  • W Sun
  • W H Sun
  • M Tacconi
  • C P Tang
  • X W Tang
  • Z C Tang
  • L Tao
  • D Tescaro
  • Samuel C C Ting
  • S M Ting
  • N Tomassetti
  • J Torsti
  • C Türkoğlu
  • T Urban
  • V Vagelli
  • E Valente
  • C Vannini
  • E Valtonen
  • S Vaurynovich
  • M Vecchi
  • M Velasco
  • J P Vialle
  • V Vitale
  • S Vitillo
  • L Q Wang
  • N H Wang
  • Q L Wang
  • R S Wang
  • X Wang
  • Z X Wang
  • Z L Weng
  • K Whitman
  • J Wienkenhöver
  • M Willenbrock
  • H Wu
  • X Wu
  • X Xia
  • M Xie
  • S Xie
  • R Q Xiong
  • N S Xu
  • W Xu
  • Q Yan
  • J Yang
  • M Yang
  • Y Yang
  • Q H Ye
  • H Yi
  • Y J Yu
  • Z Q Yu
  • S Zeissler
  • C Zhang
  • J H Zhang
  • M T Zhang
  • S D Zhang
  • S W Zhang
  • X B Zhang
  • Z Zhang
  • Z M Zheng
  • H L Zhuang
  • V Zhukov
  • A Zichichi
  • N Zimmermann
  • P Zuccon
چکیده

Knowledge of the precise rigidity dependence of the helium flux is important in understanding the origin, acceleration, and propagation of cosmic rays. A precise measurement of the helium flux in primary cosmic rays with rigidity (momentum/charge) from 1.9 GV to 3 TV based on 50 million events is presented and compared to the proton flux. The detailed variation with rigidity of the helium flux spectral index is presented for the first time. The spectral index progressively hardens at rigidities larger than 100 GV. The rigidity dependence of the helium flux spectral index is similar to that of the proton spectral index though the magnitudes are different. Remarkably, the spectral index of the proton to helium flux ratio increases with rigidity up to 45 GV and then becomes constant; the flux ratio above 45 GV is well described by a single power law.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Cosmic Ray Astrophysics with AMS-02

The Alpha Magnetic Spectrometer (AMS) is a cosmic ray (CR) experiment that will operate on the International Space Station for three years, measuring the particle spectra in the rigidity range from 0.2 GV to 2 TV. The AMS-02 detector will provide measurements with unprecedented statistics of the hadronic and leptonic cosmic rays, allowing for a better study of the Earth magnetosphere through th...

متن کامل

Cosmic ray strangelets

Searching for strangelets in cosmic rays may be the best way to test the possible stability of strange quark matter. I review calculations of the astrophysical strangelet flux in the GV–TV rigidity range, which will be investigated from the Alpha Magnetic Spectrometer (AMS-02) on the International Space Station, and discuss the merits of strangelets as ultra-high energy cosmic rays at EeV–ZeV e...

متن کامل

Astroparticle Physics with Ams02

The Alpha Magnetic Spectrometer (AMS02) experiment will be installed in 2009 on the International Space Station (ISS) for an operational period of at least three years. The purpose of AMS02 experiment is to perform accurate, high statistics, long duration measurements in space of charged cosmic rays in rigidity range from 1 GV to 3 TV and of high energy photons up to few hundred of GeV. In this...

متن کامل

02 04 8 v 1 1 7 Fe b 20 00 Search for Antihelium in Cosmic Rays

The Alpha Magnetic Spectrometer (AMS) was flown on the space shuttle Discovery during flight STS–91 in a 51.7 • orbit at altitudes between 320 and 390 km. A total of 2.86 × 10 6 helium nuclei were observed in the rigidity range 1 to 140 GV. No antihelium nuclei were detected at any rigidity. An upper limit on the flux ratio of antihelium to helium of < 1.1 × 10 −6 is obtained.

متن کامل

Particle identification with the AMS-02 RICH detector: search for dark matter with antideuterons

The Alpha Magnetic Spectrometer (AMS), whose final version AMS-02 is to be installed on the International Space Station (ISS) for at least 3 years, is a detector designed to measure charged cosmic ray spectra with energies up to the TeV region and with high energy photon detection capability up to a few hundred GeV, using state-of-the art particle identification techniques. It is equipped with ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Physical review letters

دوره 115 21  شماره 

صفحات  -

تاریخ انتشار 2015