Calculated CX-neutral energy spectrum for ADITYA tokamak. The results have been obtained analytically using the slab-model assumption for ohmic plasma's circular cross section.
Schematic layout of the ADITYA charge exchange NPA.
Schematic layout of the CX-NPA and its photograph. Components inside CX-NPA are (1) stripping cell, (2) analyzer box, (3) pressure gauge, (4) positive plate (PP), (5) exit aperture at PP (straight channel), (6) alignment window, (7) electrical feedthrough, (8) grounded plate (GP), (9) entrance aperture, (10) exit apertures at GP (energy channels), (11) CEM-detector, (12) guard rings.
(a) Stripping efficiency as a function of neutral energy (E) in eV. (b) Stripping cell efficiency as a function of H2 gas pressure in mtorr. [Refer to Eq. (13) .]
Different count peaks correspond to different analyzer plate voltage Vp and H+ beam energy for channel-2.
CX-NPA calibration curve analyzer plate voltage (Vp) vs detected energy (E) for three different channels. [Refer to Eq. (3) .]
CEM photon detection efficiency with wavelength. 29
Side view of the CX-NPA after modifications made for the UV suppression.
Deuterium lamp's spectrum used to test the UV rejection capabilities of the upgraded ACX-NPA.
The illustration of charge exchange neutrals generated signals at CEM after filling up hydrogen gas at 5 mTorr in the stripping cell.
Plot shows CX-neutral counts at three different energy channels with time.
Plot of lnF vs counts at various energy channels for plasma discharge #21 743 after 60 ms of discharge initiation. [Refer to Eq. (10) .]
For plasma dischare #21 743: (a) Plot shows evolution of plasma current with time; (b) Plot shows temporal variation of central ion temperature T i (0) during flat top of the current profile.
Plot shows temporal variation of central electron temperature T e (0) and central ion temperature T i (0) for plasma discharge #22 738.
Table of the three energy channels and corresponding energy resolutions.
The suppression of VUV photons as seen on Channel-3 after the incorporation of additional components in the ACXD System.
Article metrics loading...
Full text loading...