Presentation is loading. Please wait.

Presentation is loading. Please wait.

Small solenoids cause plasma scrape-off F.F. Chen, X. Jiang, and J.D. Evans, Plasma injection with helicon sources, J. Vac. Sci. Technol. A 8, 2108 (2000)

Published byHadley Saxe Modified over 9 years ago

Similar presentations

Presentation on theme: "Small solenoids cause plasma scrape-off F.F. Chen, X. Jiang, and J.D. Evans, Plasma injection with helicon sources, J. Vac. Sci. Technol. A 8, 2108 (2000)"— Presentation transcript:

1 Small solenoids cause plasma scrape-off F.F. Chen, X. Jiang, and J.D. Evans, Plasma injection with helicon sources, J. Vac. Sci. Technol. A 8, 2108 (2000)

2 Large coil allows all plasma to be injected F.F. Chen, X. Jiang, and J.D. Evans, Plasma injection with helicon sources, J. Vac. Sci. Technol. A 8, 2108 (2000)

3 The low-field peak can be seen with a large coil F.F. Chen, X. Jiang, and J.D. Evans, Plasma injection with helicon sources, J. Vac. Sci. Technol. A 8, 2108 (2000) F.F. Chen and G. Chevalier, Experiments on helicon plasma sources, J. Vac. Sci. Technol. A 10, 1389 (1992) Original low-field peak we were trying to reproduce Result with single tube + large coil

4 A multitube source with small solenoids gave low n F.F. Chen, J.D. Evans, and G.R. Tynan, Design and performance of distributed helicon sources, Plasma Sources Sci. Technol. 10, 236 (2001)

5 Large coil + stubby sources work very well! F.F. Chen, J.D. Evans, and G.R. Tynan, Design and performance of distributed helicon sources, Plasma Sources Sci. Technol. 10, 236 (2001)

6 Details of 7-tube distributed helicon source F.F. Chen, J.D. Evans, and G.R. Tynan, Design and performance of distributed helicon sources, Plasma Sources Sci. Technol. 10, 236 (2001) m = 0 antenna

7 Azimuthal uniformity at various radii F.F. Chen, J.D. Evans, and G.R. Tynan, Design and performance of distributed helicon sources, Plasma Sources Sci. Technol. 10, 236 (2001)

8 +/- 3% over 40 cm diameter F.F. Chen, J.D. Evans, and G.R. Tynan, Design and performance of distributed helicon sources, Plasma Sources Sci. Technol. 10, 236 (2001)

9 > 10 12 cm -3 at 20 G, 5 mTorr, 13.56 MHz F.F. Chen, J.D. Evans, and G.R. Tynan, Design and performance of distributed helicon sources, Plasma Sources Sci. Technol. 10, 236 (2001)

10 Even smoother at 27 cm downstream F.F. Chen, J.D. Evans, and G.R. Tynan, Design and performance of distributed helicon sources, Plasma Sources Sci. Technol. 10, 236 (2001)

Download ppt "Small solenoids cause plasma scrape-off F.F. Chen, X. Jiang, and J.D. Evans, Plasma injection with helicon sources, J. Vac. Sci. Technol. A 8, 2108 (2000)"

Similar presentations

Energy deposition in Q0 Elena Wildner 19/04/07. Strategy 1. Define a TAS to protect the Q0 2. Optics:  *= 0.25m 3. Calculate, with some optimization.

Energy deposition in Q0 Elena Wildner 19/04/07. Strategy 1. Define a TAS to protect the Q0 2. Optics:  *= 0.25m 3. Calculate, with some optimization.
ION ENERGY DISTRIBUTIONS IN INDUCTIVELY COUPLED PLASMAS HAVING A BIASED BOUNDARY ELECTRODE* Michael D. Logue and Mark J. Kushner Dept. of Electrical Engineering.

ION ENERGY DISTRIBUTIONS IN INDUCTIVELY COUPLED PLASMAS HAVING A BIASED BOUNDARY ELECTRODE* Michael D. Logue and Mark J. Kushner Dept. of Electrical Engineering.
Permanent-magnet helicon sources for etching, coating, and thrust Francis F. Chen, UCLA Low Temperature Plasma Teleseminar, June 14, 2013; originally prepared.

Permanent-magnet helicon sources for etching, coating, and thrust Francis F. Chen, UCLA Low Temperature Plasma Teleseminar, June 14, 2013; originally prepared.
NUMERICAL INVESTIGATION OF WAVE EFFECTS IN HIGH-FREQUENCY CAPACITIVELY COUPLED PLASMAS* Yang Yang and Mark J. Kushner Department of Electrical and Computer.

NUMERICAL INVESTIGATION OF WAVE EFFECTS IN HIGH-FREQUENCY CAPACITIVELY COUPLED PLASMAS* Yang Yang and Mark J. Kushner Department of Electrical and Computer.
Additional Calculations of the MERIT Mercury Jet Using the UCLA HIMAG Code Neil Morley and Manmeet Narula Fusion Science and Technology Group, UCLA

Additional Calculations of the MERIT Mercury Jet Using the UCLA HIMAG Code Neil Morley and Manmeet Narula Fusion Science and Technology Group, UCLA
FLUORINATION WITH REMOTE INDUCTIVELY COUPLED PLASMAS SUSTAINED IN Ar/F 2 AND Ar/NF 3 GAS MIXTURES* Sang-Heon Song a) and Mark J. Kushner b) a) Department.

FLUORINATION WITH REMOTE INDUCTIVELY COUPLED PLASMAS SUSTAINED IN Ar/F 2 AND Ar/NF 3 GAS MIXTURES* Sang-Heon Song a) and Mark J. Kushner b) a) Department.
How helicons started: 1962 UCLA 3kW 17 MHz 500G How helicons started: 1970 - 85 1 kW, 1 kG, argon n = 1013 cm-3 10X higher than normal.

How helicons started: 1962 UCLA 3kW 17 MHz 500G How helicons started: kW, 1 kG, argon n = 1013 cm-3 10X higher than normal.
Initial wave-field measurements in the Material Diagnostic Facility (MDF) Introduction : The Plasma Research Laboratory at the Australian National University.

Initial wave-field measurements in the Material Diagnostic Facility (MDF) Introduction : The Plasma Research Laboratory at the Australian National University.
Optimization of Source Modules

Optimization of Source Modules
What are helicons? Helicons are partially ionized RF discharges in a magnetic field. They are basically whistler modes confined to a cylinder. They are.

What are helicons? Helicons are partially ionized RF discharges in a magnetic field. They are basically whistler modes confined to a cylinder. They are.
Design of PM helicon arrays UCLA 1.Optimization of the discharge tube 2.Design of the permanent magnets 3.Design of a multi-tube array 4.Design and construction.

Design of PM helicon arrays UCLA 1.Optimization of the discharge tube 2.Design of the permanent magnets 3.Design of a multi-tube array 4.Design and construction.
门诊科室： **** 科 2013 年 * 月 * 日. 请根据各科室目标责任书填写 壹 服务量指标 项目 南部北部总计 指标完成指标完成指标完成 门急诊人次 人均门急诊人次（人次） 专家门诊人次.

门诊科室： **** 科 2013 年 * 月 * 日. 请根据各科室目标责任书填写 壹 服务量指标 项目 南部北部总计 指标完成指标完成指标完成 门急诊人次 人均门急诊人次（人次） 专家门诊人次.
Selected examples 1. Anomalous skin depth in ICPs J.D. Evans and F.F. Chen, Phys. Rev. Lett. 86, 5502 (2001). 2. Anomalous transport in helicon discharges.

Selected examples 1. Anomalous skin depth in ICPs J.D. Evans and F.F. Chen, Phys. Rev. Lett. 86, 5502 (2001). 2. Anomalous transport in helicon discharges.
Ion Energy Distributions from a Permanent-Magnet Helicon Thruster Francis F. Chen, UCLA Low Temperature Plasma Physics Webinar, January 17, 2014.

Ion Energy Distributions from a Permanent-Magnet Helicon Thruster Francis F. Chen, UCLA Low Temperature Plasma Physics Webinar, January 17, 2014.
THE IOWA IQ-2 Q MACHINE. Schematic diagram of IQ-2 HP-E HP-W Pumping system 30 cm 198 cm 60 cm 63.5 mm 50 cm.

THE IOWA IQ-2 Q MACHINE. Schematic diagram of IQ-2 HP-E HP-W Pumping system 30 cm 198 cm 60 cm 63.5 mm 50 cm.
Two problems with gas discharges 1.Anomalous skin depth in ICPs 2.Electron diffusion across magnetic fields Problem 1: Density does not peak near the.

Two problems with gas discharges 1.Anomalous skin depth in ICPs 2.Electron diffusion across magnetic fields Problem 1: Density does not peak near the.
UCLA LANGMUIR PROBES IN THE INTENSE RF ENVIRONMENT INSIDE A HELICON DISCHARGE Francis F. Chen, UCLA Gaseous Electronics Conference, Austin TX, Tuesday,

UCLA LANGMUIR PROBES IN THE INTENSE RF ENVIRONMENT INSIDE A HELICON DISCHARGE Francis F. Chen, UCLA Gaseous Electronics Conference, Austin TX, Tuesday,
HYDROGEN HELICONS Part 1: Preliminary considerations Part 2: Design for high density Part 3: Design for low density Francis F. Chen, UCLA, October, 2008.

HYDROGEN HELICONS Part 1: Preliminary considerations Part 2: Design for high density Part 3: Design for low density Francis F. Chen, UCLA, October, 2008.
Applications of permanent- magnet sources and arrays Francis F. Chen INER, February 24, 2009.

Applications of permanent- magnet sources and arrays Francis F. Chen INER, February 24, 2009.
1234567891011121314151617181920 2122232425262728293031323334353637383940 41424344454647484950 1.2. 3. 4.5.

Similar presentations

Ads by Google