CREAM-I飞行的元素光谱

CREAM第二次飞行的cosmic-ray能谱测量

Measurements of cosmic-ray energy spectra with the 2nd CREAM flight

在第二次南极飞行期间，CREAM（宇宙射线能量学和质量）气球实验收集了28天的数据，用一个冗余的粒子识别系统和一个成像薄电离量热计测量了宇宙射线（CR）的电荷和能量。个别CR核的绝对强度的初步直接测量报告中的元素范围从碳到铁在非常高的能量。

从第一次CREAM飞行的能量交叉校准：跃迁辐射探测器与量热计

Energy cross-calibration from the first CREAM flight: transition radiation detector versus calorimeter

宇宙射线能量学和质量（CREAM）气球实验在2004/05和2005/06两次成功飞行。它被设计用于执行从几个GeV到1000 TeV的能量测量，利用不同的检测技术。第一台仪器CREAM-1将跃迁辐射探测器与量热计结合起来，提供宇宙射线核的独立能量测量。每个探测器都用能量范围有限的粒子束进行了校准。为了评估仪器的绝对能量标度，并研究每种技术的系统效应，通过比较两个独立的能量估计对氧和碳原子核的选定样品进行交叉校准。

CREAM- II测量的宇宙射线元素能谱

Elemental energy spectra of cosmic rays measured by CREAM-II

我们提出了新的测量宇宙射线（CR）核的能量谱从第二次飞行的球载实验CREAM（宇宙射线能量学和质量）。该仪器（CREAM-II）由基于不同技术（切伦科夫光、电离器和硅传感器中的特定电离）的探测器组成，以提供冗余电荷识别和一个薄的电离量热计，能够测量高达数百TeV的宇宙射线的能量。数据分析进行了描述和个人的能谱的C，O，Ne，Mg，Si和Fe的报告高达~ 10^14 eV。对于所有的基本元素，光谱形状看起来几乎相同，并且可以表示为能量E^{-2.66+/-0.04}的幂律。还测量了100-800 GeV/n能量范围内氮原子的绝对强度。

Beam test calibration of the balloon-borne imaging calorimeter for the CREAM experiment

CREAM (Cosmic Ray Energetics And Mass) is a multi-flight balloon mission designed to collect direct data on the elemental composition and individual energy spectra of cosmic rays. Two instrument suites have been built to be flown alternately on a yearly base. The tungsten/Sci-Fi imaging calorimeter for the second flight, scheduled for December 2005, was calibrated with electron and proton beams at CERN. A calibration procedure based on the study of the longitudinal shower profile is described and preliminary results of the beam test are presented.

Proton and Helium Spectra from the CREAM-III Flight

Primary cosmic-ray elemental spectra have been measured with the balloon-borne Cosmic Ray Energetics And Mass (CREAM) experiment since 2004. The third CREAM payload (CREAM-III) flew for 29 days during the 2007-2008 Antarctic season. Energies of incident particles above 1 TeV are measured with a calorimeter. Individual elements are clearly separated with a charge resolution of ~0.12 e (in charge units) and ~0.14 e for protons and helium nuclei, respectively, using two layers of silicon charge detectors. The measured proton and helium energy spectra at the top of the atmosphere are harder than o…

CREAM-I量热计的校准

Calibration of the CREAM-I calorimeter

宇宙射线能量与质量（CREAM）量热计被设计用来测量能量范围从~10^11 eV到~10^15 eV的宇宙射线粒子的光谱。2004/2005年南极季节，该卫星作为CREAM-I号气球运载有效载荷的一部分在南极进行了首次飞行，其暴露时间达到创纪录的42天。将讨论使用各种束流测试数据的量热计校准，试图评估能量测量的不确定性。