CREAM Mission Overview
- Published: 21 November 2008
- Written by Eun-Suk Seo
The CREAM mission has had six successful flights: (1) 12/16/04 – 1/27/05, (2) 12/16/05 – 1/13/06, (3) 12/19/07 – 1/17/08, (4) 12/19/08 – 1/7/09, and (5) 12/1/09 – 1/8/10, and (6) 12/20/2010 – 12/26/2010 respectively called CREAM-I, -II, -III, -IV, -V, and -VI. A 40 million cubic foot (1.1 million cubic meter) balloon carried each payload to its float altitude between ~38 and ~40 km, with an average atmospheric overburden of ~3.9 g/cm2. A cumulative exposure of ~161 days has been achieved.
Examples of current results are given below:
- Cosmic-Ray Proton and Helium Spectra from the First CREAM Flight
- Discrepant Hardening Observed in Cosmic-ray Elemental Spectra
- Energy Spectra of Cosmic-ray Nuclei at High Energies
- Measurements of the Relative Abundances of High-energy Cosmic-ray Nuclei in the TeV/Nucleon Region
- Measurements of cosmic-ray secondary nuclei at high energies with the first flight of the CREAM balloon-borne experiment
While waiting for the ISS-CREAM launch, the other balloon payload including a Transition Radiation Detector, which is too large for the JEM-EF envelope, is being prepared for another Antarctic balloon flight in 2016. This so-called Boron And Carbon Cosmic rays in the Upper Stratosphere (BACCUS) mission will focus on the B/C ratio to investigate cosmic ray propagation history.