Objectives]
To observe collective behavior (density, temperature etc.) of electrons and magnetohydrodynamic activity in a high temperature plasma.
[Detectors, Diagnostic Method]
Soft X-rays emitted as bremsstrahlung by free electrons in a plasma are detected by two (upper and lower) detector arrays. Each detector array consists of thirty-two PIN diodes and a Beryllium (Be) filter with 200 mm thickness.
Bremsstrahlung is a function of electron density, temperature, and impurity contamination and is sensitive to electron temperature in the energy range of the soft X-ray. Evolution of the soft X-ray intensity profile suggests the collective motion of electrons or magnetohydrodynamic activity in a plasma.
Specifications
| Detector | : PIN diode (HAMAMATSU S3706-SPL 9402) |
| Energy range | : 2.7 - 20 keV |
| Number of detectors | : Upper Array : 32 Channels : Lower Array: 32 Channels |
| Time resolution | : 80 ms |
| (Depend on the data acquisition system) | |
Spatial resolution |
: 3 - 5 cm |
Reference
K. Nagashima et al., "Soft X-ray Intensity Profile Measurement by PIN Diode Array System", Journal of Plasma and Fusion Research, Vol.59 supplement (1988) and papers sited therein.
