Study of the Origin of the Cosmic-Ray Antiprotons using the BESS Spectrometer

使用 BESS 光谱仪研究宇宙射线反质子的起源

• 批准号: 11694104
• 负责人: YOSHIDA Tetsuya
• 金额: $ 8.58万
• 依托单位: High Energy Accelerator Research Organization (KEK)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A).
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11694104/
• 关键词: BESS Spectrometer; Low Energy Antiproton; Proton; He Spectrum; Cosmic Antimatter; Solar Modulation; Muon Spectrum; Long Duration Flight; 低エネルギー宇宙線反陽子; 陽子ヘリウムスペクトラム

In order to study the origin of the cosmic-ray antiprotons,1. Two successive balloon-borne experiments with the BESS superconducting spectrometer have been carried out in 1999 and 2000 to measure precise spectrum of the cosmic rays at the solar maximum period. In these flights, more than thousand antiproton events were accumulated.2. By the data from those flights, charge dependence on the solar modulation was clearly observed, which is inevitable to understand the energy spectrum of secondary antiprotons.3. A search for antihelium nuclei in the primary cosmic rays has been carried out and an upper limit of the ratio of antiheliums to helium nuclei to be less than 7×10^<-7> was placed, which is most stringent in the world.4. Precise energy spectrum of primary protons was measured, especially in low energy region below 1 GeV.Using the data during the acsend of the balloon, residual pressure dependence on the proton spectrum was observed in order to check models of the development of cosmic rays in the atmosphere.5. The 7^<th> BESS workshop was held to evaluate the results from past BESS experiments. For further investigation of the primary origin of the low energy antiprotons, a longer balloon-borne experiment with smaller superconducting spectrometer was discussed and planed by a long duration flight in Antarctica in that workshop.

为了研究宇宙射线抗蛋白酶的起源，1。在1999年和2000年进行了两个成功的气球传播实验，以测量太阳能最高时期的宇宙射线的精确光谱。在这些航班中，累积了数千多个抗蛋白酶事件。2。通过这些飞行的数据，明确观察到了对太阳能调制的电荷依赖性，这是不可避免地要了解次级抗脂子的能量光谱。3。在原发性宇宙射线中搜索抗核核，并放置了抗纤维与氦核比率的上限，将其放置在世界上最为严格的抗纤维射线。测量了原代质子的精确能谱，尤其是在低于1 GEV的低能区域中。使用气球的附加过程中的数据，观察到对质子光谱的残留压力依赖性，以检查大气中宇宙射线发展的模型。5。举行了7^<th> BESS研讨会，以评估过去BESS实验的结果。为了进一步研究低能量抗抗物子的主要起源，通过在该研讨会的南极洲进行了长时间的持续时间，讨论并计划了一个更长的气球传播实验，并计划了较小的超导光谱仪。

项目成果

T.Sanuki et al.: "Precise Measurement of Cosmic-Ray Proton and Helium Spectra with the BESS"The Asrrophysical Journal. 545. 1135-1142 (2000)

T.Sanuki 等人：“使用 BESS 精确测量宇宙射线质子和氦光谱”《Asrrophysical Journal》。

H.Matsumoto et al.: "Technical Progress of the BESS Spectrometer"Proc.22^<nd> Intl.Symposium Space Technology and Science. 2. 1659-1663 (2000)

H.Matsumoto 等人：“BESS 光谱仪的技术进展”Proc.22^<nd> 国际空间技术与科学研讨会。

J. Z. Wang et. al.: "Measurement of Cosmic-Ray Hand He Isotopes in a Series of Aurcal Ballour Flights"Proc. 26th Intl. Cosmic Ray Conf. (Utah). 3. 37-40 (1999)

J.Z.王等。

J.Z.WANG ET AL.: "MEASUREMENT OF COSMIC-RAY H AND HE ISOTOPES IN A SERIES OF ANNUAL BALLOON FLIGHTS"PROC.26^<TH> INTL.COSMIC RAY CONF.. 3. 37-40 (1999)

J.Z.WANG 等人：“在一系列年度气球飞行中测量宇宙射线 H 和 HE 同位素”PROC.26^<TH> INTL.COSMIC RAY CONF.. 3. 37-40 (1999)

K. Yoshimura et. al.: "Measurement of Cosmic-Ray Antiproton Spectrum in the Energy Range 0.18 to 3.56 GeV at Solar Minimum"Proc. 26th Intl. Cosmic Ray Conf. (Utah). 3. 81-84 (1999)

K.吉村等。