Article

The Energetic Trans-Iron Composition Experiment (ENTICE) on the Heavy Nuclei Explorer (HNX)

02/2001;
Source: NTRS

ABSTRACT The ENTICE experiment is one of two instruments which make up the HNX mission. The experimental goal of ENTICE is to measure with high precision the elemental abundances of all nuclei with 10<=Z<=82. This will enable us to distinguish between possible injection mechanisms for the galactic cosmic ray accelerator such-as those dependent upon volatility or first ionization potential, and to study the mix of nucleosynthetic processes that contribute to the galactic cosmic ray source. The ENTICE experiment utilizes the dE/dx-C method of charge determination and consists of silicon dE/dx detectors, Cherenkov detectors with two different refractive indices, and a scintillating fiber hodoscope. The geometrical factor of the instrument is 8m2.sr. We will present a description of the instrument and its expected performance based on beam tests and a balloon flight of a prototype instrument.

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Keywords

balloon flight
 
Cherenkov detectors
 
dE/dx-C method
 
different refractive indices
 
elemental abundances
 
ENTICE
 
ENTICE experiment
 
ENTICE experiment utilizes
 
experimental goal
 
first ionization potential
 
galactic cosmic ray accelerator such-as
 
galactic cosmic ray source
 
HNX mission
 
possible injection mechanisms
 
scintillating fiber hodoscope
 
silicon dE/dx detectors