1. Soft X-Ray Diagnostic System for HT-7 and EAST Tokamaks
ASIPP
Soft X-Ray Diagnostic System for HT-7 and EAST Tokamaks
LIQUN HU

2. Physical features of the diagnostic
HT-7
ASIPP
Physical features of the diagnostic
ISXR Ne, Te, Zeff
A chord-integrated measurement—point measurement, high resolution in space and high temporal response in time to the variations happened inside of the plasma.
The intensity distribution and evolution and tomography of SXR radiation information on the plasma structure, MHD instability, sawtooth instability, phenomena occurring during major disruptions, heat pulse propagation transport et al.

3. SXR Array Diagnostic Features in HT-7
ASIPP
SXR Array Diagnostic Features in HT-7
Two multi-channel arrays, 37 detectors of rectangular Au-Si SBDs
with active area of 320 mm2, a pinhole camera like
Vertical array with
37 detectors of SBDs
Horizontal array with
Slot-aperture with a movable
slider covered with Be foils
Au-Si detector
Sensitive energy region: keV
Spatial resolution: 1.5cm
Time resolution: 5s
The outmost chord: 27cm
Arc-shape SS pedestal
with R=55cm (H) and R=60cm (V)
Thin slot-apertures :
520 mm2 (V)
425 mm2 (H)
A different adjustable mechanism for 4 thickness
of Beryllium absorption foils : 5~6m, 12~13m, 25m, and full open

4. SXR Array Diagnostic with SBDs in HT-7
ASIPP
SXR Array Diagnostic with SBDs in HT-7
Plug-in electronics and fast connectors for convenient repairing of the system

5. Schematic drawing of electronics and data acquisition
HT-7
ASIPP
Schematic drawing of electronics and data acquisition
VAX3300 Computer
CAMAC
Output DC
Regulator
Rejecter
Power supply
~220V
Au-Si detector
Signal current
transform to
Voltage
preamplifier
with variable gain
Sawtooth Heat
Pulse Propagation for e
Differential
Circuit

6. Modification of HT-7 SXR detector
ASIPP
Modification of HT-7 SXR detector
HAMAMATSU: S N/35N
Low terminal capacitor and high speed
Down: 0.510mm slit, 1.6cm~0.7cm
Below: 0.510mm slit, 1.6cm~0.7cm
Above: 1.010mm slit, 1.5cm~0.9cm

7. HT-7U SXR Pinhole Camera
ASIPP
HT-7U SXR Pinhole Camera
11, each with 46 elements, 3 toroidal positions, 1-20keV, 1.0cm, cooling plate, adjustable mechanism for protection.