Langmuir probe diagnostics of plasma in high current electron cyclotron resonance proton ion source

Journal Article · Mon Jul 15 00:00:00 EDT 2013 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4813279· OSTI ID:22220541

Roychowdhury, P.; Kewlani, H.; Mishra, L.; Mittal, K. C. ^[1]; Patil, D. S. ^[2]

---

1. Accelerator and Pulse Power Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085 (India)
2. Laser and Plasma Technology Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085 (India)

A high current Electron Cyclotron Resonance (ECR) proton ion source has been developed for low energy high intensity proton accelerator at Bhabha Atomic Research Centre. Langmuir probe diagnostics of the plasma generated in this proton ion source is performed using Langmuir probe. The diagnostics of plasma in the ion source is important as it determines beam parameters of the ion source, i.e., beam current, emittance, and available species. The plasma parameter measurement in the ion source is performed in continuously working and pulsed mode using hydrogen as plasma generation gas. The measurement is performed in the ECR zone for operating pressure and microwave power range of 10{sup −4}–10{sup −3} mbar and 400–1000 W. An automated Langmuir probe diagnostics unit with data acquisition system is developed to measure these parameters. The diagnostics studies indicate that the plasma density and plasma electron temperature measured are in the range 5.6 × 10{sup 10} cm{sup −3} to 3.8 × 10{sup 11} cm{sup −3} and 4–14 eV, respectively. Using this plasma, ion beam current of tens of mA is extracted. The variations of plasma parameters with microwave power, gas pressure, and radial location of the probe have been studied.

• OSTI ID: 22220541
• Journal Information: Review of Scientific Instruments, Vol. 84, Issue 7; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
43 PARTICLE ACCELERATORS
ACCELERATORS
CURRENTS
DATA ACQUISITION SYSTEMS
ELECTRON BEAMS
ELECTRON CYCLOTRON-RESONANCE
ELECTRON TEMPERATURE
EV RANGE
HYDROGEN
ION BEAMS
ION SOURCES
ION TEMPERATURE
LANGMUIR PROBE
MICROWAVE RADIATION
PLASMA DENSITY
POWER RANGE
PROTONS
RF SYSTEMS