Precise Measurement of Cosmic‐Ray Proton and Helium Spectra with the BESS Spectrometer

2000 ◽  
Vol 545 (2) ◽  
pp. 1135-1142 ◽  
Author(s):  
T. Sanuki ◽  
M. Motoki ◽  
H. Matsumoto ◽  
E. S. Seo ◽  
J. Z. Wang ◽  
...  
Keyword(s):  
Precise Measurement ◽  
Cosmic Ray ◽  
Helium Spectra

scholarly journals Measurement of the cosmic ray proton spectrum from 40 GeV to 100 TeV with the DAMPE satellite

2019 ◽  
Vol 5 (9) ◽  
pp. eaax3793 ◽  
Author(s):  
◽  
Q. An ◽  
R. Asfandiyarov ◽  
P. Azzarello ◽  
P. Bernardini ◽  
...  
Keyword(s):  
Cosmic Rays ◽  
Cosmic Radiation ◽  
Precise Measurement ◽  
Milky Way ◽  
Spectral Feature ◽  
Dark Matter Particle ◽  
Cosmic Ray ◽  
Galactic Cosmic Rays ◽  
Proton Spectrum ◽  
First Time

The precise measurement of the spectrum of protons, the most abundant component of the cosmic radiation, is necessary to understand the source and acceleration of cosmic rays in the Milky Way. This work reports the measurement of the cosmic ray proton fluxes with kinetic energies from 40 GeV to 100 TeV, with 2 1/2 years of data recorded by the DArk Matter Particle Explorer (DAMPE). This is the first time that an experiment directly measures the cosmic ray protons up to ~100 TeV with high statistics. The measured spectrum confirms the spectral hardening at ~300 GeV found by previous experiments and reveals a softening at ~13.6 TeV, with the spectral index changing from ~2.60 to ~2.85. Our result suggests the existence of a new spectral feature of cosmic rays at energies lower than the so-called knee and sheds new light on the origin of Galactic cosmic rays.

scholarly journals The Cosmic‐Ray Proton and Helium Spectra between 0.4 and 200 GV

1999 ◽  
Vol 518 (1) ◽  
pp. 457-472 ◽  
Author(s):  
M. Boezio ◽  
P. Carlson ◽  
T. Francke ◽  
N. Weber ◽  
M. Suffert ◽  
...  
Keyword(s):  
Cosmic Ray ◽  
Helium Spectra

scholarly journals Cosmic-Ray Proton and Helium Spectra above 50 GeV

1972 ◽  
Vol 28 (15) ◽  
pp. 985-988 ◽  
Author(s):  
M. J. Ryan ◽  
J. F. Ormes ◽  
V. K. Balasubrahmanyan
Keyword(s):  
Cosmic Ray ◽  
Helium Spectra

Cosmic-ray proton and helium spectra and solar modulation effects in the new solar cycle measured with a four-element counter telescope

1968 ◽  
Vol 46 (10) ◽  
pp. S883-S886 ◽  
Author(s):  
J. F. Ormes ◽  
W. R. Webber
Keyword(s):  
Scintillation Counter ◽  
Pulse Height ◽  
Cosmic Ray ◽  
Geometrical Factor ◽  
Solar Modulation ◽  
Primary Proton ◽  
Before And After ◽  
Order Of Magnitude ◽  
Helium Spectra ◽  
Counter Telescope

In the summers of 1965 and 1966 we have continued our studies begun in 1963 on the primary proton and helium spectra and the effects of solar modulation. Data are available from four additional balloon flights at Fort Churchill using the earlier version of the Cerenkov-scintillation counter telescope (Ormes and Webber 1966), and a new four-element double-scintillation (dE/dx), Cerenkov-scintillation + range telescope. This latest telescope employs pulse-height analysis on both dE/dx counters and the Cerenkov-scintillation counter. Various consistency requirements may be set between pulse heights. These serve to reduce background effects by an order of magnitude over the previous system. The geometrical factor of the telescope is 55.4 sr cm2. The results reported here will cover the proton and helium spectra from 100 MeV/nucleon to 2 BeV/nucleon and their time variation. They will show that the fractional changes in the differential proton spectra can be represented by (rigidity)−1 both before and after the sunspot minimum and that there is no evidence for any hysteresis effects between protons of 100 MeV to 2 BeV and energies to which neutron monitors respond.

scholarly journals COSMIC-RAY PROTON AND HELIUM SPECTRA FROM THE FIRST CREAM FLIGHT

2011 ◽  
Vol 728 (2) ◽  
pp. 122 ◽  
Author(s):  
Y. S. Yoon ◽  
H. S. Ahn ◽  
P. S. Allison ◽  
M. G. Bagliesi ◽  
J. J. Beatty ◽  
...  
Keyword(s):  
Cosmic Ray ◽  
Helium Spectra

THE ATTENUATION LENGTH OF COSMIC RAY IRON IN THE ATMOSPHERE OBTAINED BY TIGER EXPERIMENT

2005 ◽  
Vol 20 (29) ◽  
pp. 6702-6704
Author(s):  
S. KODAIRA ◽  
M. HAREYAMA ◽  
N. HASEBE ◽  
T. MIYACHI ◽  
K. SAKURAI ◽  
...  
Keyword(s):  
Cosmic Rays ◽  
Precise Measurement ◽  
Cosmic Ray ◽  
Galactic Cosmic Rays ◽  
Attenuation Length ◽  
Flight Data ◽  
Elemental Abundances ◽  
Balloon Experiment ◽  
Path Lengths ◽  
Balloon Measurements

A precise measurement of elemental abundances of galactic cosmic rays from charges Z = 20 to 34 was made by TIGER balloon experiment. Using the various path lengths in the atmosphere between 4 and 16 g/cm2 from the TIGER flight data, we derived the attenuation length of iron nuclei with the energy above 2.5 GeV/n in the atmosphere. As the result, we obtained the attenuation length of 15.5 ± 0.6 g/cm 2 which is consistent with previous results of balloon measurements.

scholarly journals High precision particle astrophysics as a new window on the universe with an Antimatter Large Acceptance Detector In Orbit (ALADInO)

2021 ◽  
Author(s):  
R. Battiston ◽  
B. Bertucci ◽  
O. Adriani ◽  
G. Ambrosi ◽  
B. Baoudoy ◽  
...  
Keyword(s):  
Cosmic Radiation ◽  
Precise Measurement ◽  
Cosmic Ray ◽  
High Energy ◽  
Indirect Detection ◽  
High Energy Astrophysics ◽  
Large Acceptance ◽  
Scientific Questions ◽  
The Universe

AbstractMultimessenger astrophysics is based on the detection, with the highest possible accuracy, of the cosmic radiation. During the last 20 years, the advent space-borne magnetic spectrometers in space (AMS-01, Pamela, AMS-02), able to measure the charged cosmic radiation separating matter from antimatter, and to provide accurate measurement of the rarest components of Cosmic Rays (CRs) to the highest possible energies, have become possible, together with the ultra-precise measurement of ordinary CRs. These developments started the era of precision Cosmic Ray physics providing access to a rich program of high-energy astrophysics addressing fundamental questions like matter-antimatter asymmetry, indirect detection for Dark Matter and the detailed study of origin, acceleration and propagation of CRs and their interactions with the interstellar medium.In this paper we address the above-mentioned scientific questions, in the context of a second generation, large acceptance, superconducting magnetic spectrometer proposed as mission in the context of the European Space Agency’s Voyage2050 long-term plan: the Antimatter Large Acceptance Detector In Orbit (ALADInO) would extend by about two orders of magnitude in energy and flux sensitivity the separation between charged particles/anti-particles, making it uniquely suited for addressing and potentially solving some of the most puzzling issues of modern cosmology.

scholarly journals The energy spectrum of cosmic rays beyond the turn-down around $$\varvec{10^{17}}$$ eV as measured with the surface detector of the Pierre Auger Observatory

2021 ◽  
Vol 81 (11) ◽  
Author(s):  
P. Abreu ◽  
M. Aglietta ◽  
J. M. Albury ◽  
I. Allekotte ◽  
A. Almela ◽  
...  
Keyword(s):  
Cosmic Rays ◽  
Precise Measurement ◽  
Spectral Feature ◽  
Cosmic Ray ◽  
Energy Scale ◽  
Pierre Auger Observatory ◽  
Single Measurement ◽  
Surface Detector ◽  
Single Detector ◽  
Detector Type

AbstractWe present a measurement of the cosmic-ray spectrum above 100 PeV using the part of the surface detector of the Pierre Auger Observatory that has a spacing of 750 m. An inflection of the spectrum is observed, confirming the presence of the so-called second-knee feature. The spectrum is then combined with that of the 1500 m array to produce a single measurement of the flux, linking this spectral feature with the three additional breaks at the highest energies. The combined spectrum, with an energy scale set calorimetrically via fluorescence telescopes and using a single detector type, results in the most statistically and systematically precise measurement of spectral breaks yet obtained. These measurements are critical for furthering our understanding of the highest energy cosmic rays.

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