Brian LaBombard

Photo Senior Research Scientist

MIT Plasma Science & Fusion Center, NW17-109

175 Albany St., Cambridge, MA 02139, USA

TEL.: 617-253-7264 FAX: 617-253-0627

Publications: Google Scholar

Reasearch Topics

Divertor Test Tokamak and a Strategy to Solve Divertor/PMI Challenges

Adanced Divertor and RF Tokamak Experiment (ADX)

X-point Target Divertor

High Field Side Scrape-off Layer

Boundary Plasma and Divertor Physics

Shoelace Antenna

Mirror Langmuir Probe

Boundary Plasma Diagnostics Development

Miniature Penning Gauge

Alcator C-Mod Cryopump

KN1D

Research Interests

Brian has been a leader in the area of experimental plasma boundary and divertor physics in magnetic fusion devices since joining that nascent field as a graduate student in 1978. Boundary plasma physics plays a critical role in the performance of magnetic fusion devices – setting the power and particle flux densities to first wall surfaces, determining impurity levels in the plasma core, imposing boundary conditions for plasma flow and rotation, and participating in the formation of edge transport barriers, all of which ultimately determine the level of plasma energy confinement.

The scientific feasibility of energy production from plasma fusion will be demonstrated in ITER, yielding 10 times more power out than in. Yet, much more research is required, and new research facilities are needed, to identify and demonstrate robust solutions to power exhaust and plasma-material interaction challenges for electricity-producing fusion reactors. Ultimately, the success of these devices will come from assembling the knowledge base, developing the first-principles understanding and demonstrating the means to control boundary plasma phenomena.

Education

MIT, Cambridge, Massachusetts, Sc.D. (1986) Nuclear Engineering, Applied Plasma Physics
U. Lowell, Lowell, Massachusetts, B.S., summa cum laude (1978) Nuclear Engineering

Biographical Sketch

Brian began his plasma studies as an MIT doctoral student on the Alcator A and C tokamaks. Building a unique array of Langmuir probes, he performed experiments that revealed edge plasma conditions with unprecedented detail and uncovered key information on poloidal transport asymmetries and MARFE phenomena. In 1986, Dr. LaBombard joined the PISCES plasma-material facility at UCLA. As co-principal investigator, he initiated basic plasma physics experiments on PISCES-A and CCT (Continuous Current Tokamak) and was a project leader for construction of the PISCES-B facility. Dr. LaBombard joined Alcator C-Mod in 1988 at the start of its construction phase and was a key contributor to the design, procurement and installation of divetor and first-wall components, including the 7,000 molybdenum tiles and the 'vertical target plate divertor' - a divertor geometry that has since been implemented by many other tokamaks, including ITER. With the help of students, Brian led the assembly of an extensive set of edge diagnostics for C-Mod, including scanning probe systems, gas-injection scanning probe, capillary gas injection system (NINJA), impurity 'plume' optical diagnostics, embedded probe arrays, divertor pressure measurements and a novel 'Omegatron' in-situ ion mass spectrometer. In support of the broader magnetic fusion science program, Brian also makes key contributions in the design/engineering of first-wall and divertor components, such as leading the design of a novel crypump and upper divertor system in Alcator C-Mod and developing miniaturized Penning gauges that are robust, easily to implement and can measure divertor neutral pressures an order of magnitude higher than conventional gauges.

Using these research tools, Brian has made seminal contributions to boundary plasma physics: uncovering ‘main-chamber recycling’ phenomenon in C-Mod’s diverted plasmas and revealing intermittent, non-diffusive transport in the scrape-off layer as the underlying cause; identifying edge plasma transport and its scaling with collisionality as a key physics ingredient in the empirical tokamak density limit; demonstrating that ballooning-like transport asymmetries drive near-sonic parallel plasma flows in the plasma edge and that such transport-driven flows impose a toroidal rotation boundary condition for the confined plasma; uncovering evidence that pressure gradients are constrained near the last-closed flux surface, being clamped at a ‘critical value’ that scales with poloidal magnetic field squared and varies with plasma collisionality. These observations broadly connect with results from state-of-the-art numerical simulations of electromagnetic plasma turbulence, pointing toward a first-principles understanding of the underlying transport physics, including the physics of the tokamak density limit. Two of Brian's first-authored papers [Nuclear Fusion 44 (2004) 1047 and Nuclear Fusion 45 (2005) 1658] were nominated for the 2007 and 2008 Nuclear Fusion awards – one of the ten “very best papers published” in 2004 and 2005, respectively.

Dr. LaBombard has invented and developed a new research tool, the Mirror Langmuir Probe, and is using this powerful diagnostic to explore boundary plasma profiles, turbulence and transport with unprecedented detail.

Most recently, Dr. LaBombard has turned attention to finding solutions for handling extreme levels of plasma heat exhaust from a fusion reactor, proposing the "X-point target divertor" concept and developing ideas for a national Advanced Divertor and rf tokamak eXperiment (ADX) that would access reactor-level divertor conditions to develop, test and demonstrate state-of-the-art divertor and RF actuator technologies.

Brian is a fellow of the American Physical Society, a key contributor to the ITER physics basis and a research supervisor for graduate and undergraduate students. He has served as external examiner for numerous graduate theses and mentor for the national undergraduate fellowship program in fusion.

Publications

Google Scholar

Divertor Test Tokamak and a Strategy to Solve Divertor/PMI Challenges

"A strategy to solve divertor heat flux and plasma-material interaction challenges for fusion -- aided by the development of demountable superconducting magnets"
White Paper contributed to the Workshop on U.S. Magnetic Fusion Research Strategic Directions, July, 2017.

"ADX: A compact, high-field, high power density Divertor Test Tokamak (DTT) and RF Sustainment Test Tokamak (STT) for fusion energy development"
White Paper contributed to the Workshop on U.S. Magnetic Fusion Research Strategic Directions, July, 2017.

"Long-leg divertors with secondary x-points: a potential solution for divertor heat flux and PMI challenges -- aided by the development of demountable HTS magnets"
White Paper and talk presented to the FESAC Transformative Enabling Technologies subcommitee, June 22, 2017.

Advanced Divertor and RF Tokamak Experiment (ADX)

"Examining Innovative Divertor and Main Chamber Options for a National Divertor Test Tokamak"
Presentation at the APS-DPP Meeting October 31 – November 4 2016, San Jose CA.
Abstract
Poster Presentation

"Plasma profiles and impurity screening behavior of the high-field side scrape-off layer in near-double-null configurations: prospect for mitigating plasma-material interactions on RF actuators and first-wall components"
Poster presentation at the 26th IAEA Fusion Energy Conference, October 17 – 22, 2016, Kyoto, Japan.
Abstract
Poster

"High-field side scrape-off layer investigation: plasma profiles and impurity screening behavior in near-double-null configurations "
Invited talk at the 22nd PSI Conference May 30 – June 6, 2016, Rome.
Talk
Paper

"Thinking outside the box: New integrated approaches are needed to solve divertor, main chamber and steady state sustainment challenges for fusion"
Review talk at the 1st IAEA Technical Meeting on Divertor Concepts, 29 Sept – 2 October 2015, Vienna, Austria.
Abstract
Invited Presentation

"Alcator C-Mod and ADX: Research on the High-Field Pathway to Fusion Energy"
Presented at the 26th IEEE Symposium on Fusion Engineering (SOFE), May 31-June 4, 2015, Austin, Texas USA
Abstract
Invited Presentation

" ADX: a high field, high power density, advanced divertor and RF tokamak"
Presented at the Plasma-Materials Interaction Community Workshop, PPPL, May 4-6, 2015
White Paper
Presentation

"MIT's High Field Research on the Fast Track to Fusion Electricity -- Alcator C-Mod and ADX"
MIT IAP Seminar, January 16, 2015 -- Slide Presentation
*** Live Video Recording of Slide Presentation ***

"ADX: a high field, high power density, advanced divertor and RF tokamak"
Paper published in Nuclear Fusion, May 2015 [Nucl. Fusion 55 (2015) 053020]

APS 2014, New Orleans, LA: "ADX: a high field, high power density, Advanced Divertor eXperiment"
Poster

"ADX: a High Field, High Power Density, Advanced Divertor Test Facility"
"Mission: Develop and demonstrate plasma exhaust, plasma-material interaction and RF current drive/heating solutions that scale to long pulse at FNSF/DEMO parameters."
Presented at the IAEA 25th Fusion Energy Conference (FEC2014), St. Pettersburg, Russia, 13-18 October 2014.
ADX: conference paper FIP/P7-18
ADX: conference poster FIP/P7-18
ADX: summary slide FIP/P7-18

"High priority divertor and PMI research on the pathway to FNSF/DEMO."
"Priorities" white paper submitted to the FESAC Strategic Planning Subpanel, June 2014

"ADX: a high field, high power density advanced divertor tokamak experiment.
Mission: Develop and demonstrate plasma exhaust and PMI physics solutions that scale to long pulse at FNSF/DEMO divertor parameters."

"Initiatives" white paper submitted to the FESAC Strategic Planning Subpanel, June 2014

"A nationally organized, advanced divertor tokamak test facility is needed to demonstrate plasma exhaust and PMI solutions for FNSF/DEMO."
Abstract for an oral presentation to the FESAC Strategic Planning Subpanel, June 2014
Oral presentation to the FESAC Strategic Planning Subpanel, June 5, 2014

"A Strategy for Resolving the Problems of Plasma-Material Interaction for FNSF - by R. Goldston."
Abstract by R. Goldston for an oral presentation to the FESAC Strategic Planning Subpanel, July 2014
Oral presentation by R. Goldston to the FESAC Strategic Planning Subpanel, July 9, 2014

"ADX: A concept for a high-power density, advanced divertor tokamak test experiment"
PPPL Seminar, May12, 2014

"Heat and particle exhaust in tokamak reactors: challenges and potential solutions"
PSFC Seminar, Dec. 20, 2013

APS 2013, Denver, CO: "Critical need for MFE: the Alcator DX high power divertor test facility"
Poster

MIT Energy Night 2013: "Alcator DX: a high power density experimental facility to advance the development of magnetic fusion energy"
Poster

Presentation to DoE at Alcator C-Mod Quarterly Revew, March 7, 2013
Alcator_DX: Oral Presentation

White Paper submitted to FESAC subcommittee on future facilities, Feb. 14, 2013
Alcator_DX: High Power Density Advanced Divertor Test Facility

X-point Target Divertor

"Fusion Reactor Designs with "Long Legs" Show Promise -- Long-leg exhaust channels shaped by magnetic field topology can provide enhanced fusion power exhaust handling and control."
Press release at the APS-DPP Meeting October 31 – November 4 2016, San Jose CA.

"Attainment of a stable, fully detached plasma state in innovative divertor configurations"
M. Umansky presentation at the APS-DPP Meeting October 31 – November 4 2016, San Jose CA.
Abstract
Invited Talk

"Assessment of X-point target divertor configuration for power handling and detachment front control"
Poster presentation at the 26th IAEA Fusion Energy Conference, October 17 – 22, 2016, Kyoto, Japan.
Abstract
Poster

"ADX: a high field, high power density, advanced divertor and RF tokamak"
Paper published in Nuclear Fusion, May 2015 [Nucl. Fusion 55 (2015) 053020]

APS 2013, Denver, CO: "X-point target divertor concept and the Alcator DX high power divertor test facility"
Oral Presentation

Presentation at MIT PSFC, Feb. 4, 2013
X-point Target Divertor Concept

High Field Side SOL

"Impurity screening behavior of the high-field side scrape-off layer in near-double-null configurations: prospect for mitigating plasma–material interactions on RF actuators and first-wall components"
LaBombard et al., Nuclear Fusion 57 (2017) 076021.

"Plasma profiles and impurity screening behavior of the high-field side scrape-off layer in near-double-null configurations: prospect for mitigating plasma-material interactions on RF actuators and first-wall components"
Poster presentation at the 26th IAEA Fusion Energy Conference, October 17 – 22, 2016, Kyoto, Japan.
Abstract
Poster

"High-field side scrape-off layer investigation: plasma profiles and impurity screening behavior in near-double-null configurations "
Invited talk at the 22nd PSI Conference May 30 – June 6, 2016, Rome.
Talk
Paper

Boundary Plasma and Divertor Physics

"Effect of divertor nitrogen seeding on the power exhaust channel width in Alcator C-Mod"
Contributed oral presentation at the 59th Annual Meeting of the APS Division of Plasma Physics October 23 - 27, 2017; Milwaukee, Wisconsin.
Abstract
Talk

"New insights on scrape-off layer profiles and turbulence in Alcator C-Mod enabled by high resolution measurements with a scanning Mirror Langmuir Probe"
Invited presentation at the 21st Joint EU-US TTF Meeting 5 – 8 September 2016, Leysin, Switzerland.
Abstract
Talk

APS 2014, New Orleans, LA: "High resolution SOL profile measurements in limited and diverted plasmas"
Oral Presentation

APS 2013, Denver, CO: "External excitation of a short-wavelength fluctuation in the Alcator C-Mod edge plasma and its relationship to the quasi-coherent mode"
A driftwave-like perturbation is externally driven in the tokanak edge plasma for the first time.
T. Golfinopoulos Invited Paper, Phys. Plasmas 21 (2014) 056111
Invited Talk
Press Release

APS 2013, Denver, CO: "New insights on boundary plasma turbulence and the Quasi-Coherent Mode in Alcator C-Mod using a Mirror Langmuir Probe"
The QCM is unambiguously identified as an electron drift-wave with significant interchange drive and EM contributions.
Invited Paper, Phys. Plasmas 21 (2014) 056108
Invited Talk
Press Release

Comparison of ion temperature measurements in the boundary of the Alcator C-Mod tokamak and implications for ion fluid heat flux limiters.
D Brunner et al Plasma Phys. Control. Fusion 55 095010 (2013).

TTF2013, Santa Rosa, CA: "Mirror Langmuir Probe observations of edge plasma turbulence and the Quasi-Coherent Mode in Alcator C-Mod"
Oral Presentation
Poster Presentation

Transport and drift-driven plasma flow components in the Alcator C-Mod boundary plasma
N. Smick, Nuclear Fusion 53 (2013) 023001

Divertor ‘death-ray’ explained: An artifact of a Langmuir probe operating at negative bias in a high-recycling divertor
D. Brunner, J. Nucl. Mater. 2013

APS 2012, Providence, RI: "Mirror Langmuir Probe measurements of fluctuation-induced heat and particle transport in the Alcator C-Mod boundary plasma
Oral Presentation

APS 2011, Salt Lake City, UT: "Shoelace' Antenna System for Direct Excitation of C-Mod's Quasi-Coherent Mode (QCM) and Boundary Layer Turbulence"
Poster_Presentation

APS 2010, Chicago, IL - Scaling of the power exhaust channel in Alcator C-Mod
Invited Paper, Phys. Plasmas 18 (2011) 056104

APS 2010, Chicago, IL - Scaling of the power exhaust channel in Alcator C-Mod
Invited Talk
Press Release from APS Meeting

Joint Research Target - Heat flux 'footprints' in the boundary plasmas of Alcator C-Mod, DIII-D and NSTX
FY2010 Annual Performance Target Final Report

Boundary Layer Heat Transport Experiments in Alcator C-Mod in Support of the FY2010 US DoE Joint Research Target
PSFC Internal Report

PSI 2010, San Diego, CA - Divertor heat flux footprints in EDA H-mode discharges on Alcator C-Mod
Poster Presentation
Paper (published in J. Nucl. Mater.)

APS 2008, Dallas, TX - Relationship between Edge Gradients and Plasma Flows in Alcator C-Mod
Contributed Oral

TTF 2008, Boulder, CO - Scrape-off layer flows, toroidal rotation and critical gradient phenomena in the tokamak edge
Plenary Invited Talk

APS 2007, Orlando, FL - Critical gradients and plasma flows in the edge of Alcator C-Mod
Invited Paper, Phys. Plasmas 15 (2008) 056106.

APS 2007, Orlando, FL - Critical gradients and plasma flows in the edge of Alcator C-Mod
Invited Talk
Press Release from APS Meeting

APS 2006, Philadelphia, PA - Critical edge gradients and flows with reversed magnetic field in Alcator C-Mod
Contributed Oral

PSI 2006, Hefei, Anhui, China - Operational Phase Space of the Edge Plasma and Its Sensitivity to Magnetic Topology in Alcator C-Mod
Contributed Talk
Paper - J, Nucl. Mater. 363-365 (2007) 517.

Edge and Pedestal Physics ITPA Group Meeting at MIT, April 10-12, 2006 - Plasma flows and critical gradient phenomena near the last-closed flux surface
Workshop Talk

APS 2005, Denver, CO - Operational Phase Space of the Edge Plasma in Alcator C-Mod
Contributed Oral

Evidence for electromagnetic fluid drift turbulence controlling the edge plasma state in the Alcator C-Mod tokamak
Nuclear Fusion 45 (2005) 1658

EPS 2005, Tarragona, Spain - Transport-driven scrape-off layer flows and the role of the x-point
Invited Talk

Sherwood 2005, Stateline, Nevada - Scrape-off layer flows, magnetic topology, and the boundary conditions imposed at the separatrix in a tokamak plasma
Review Talk

APS 2004, Savannah, GA - Transport-driven scrape-off layer flows and the x-point dependence of the L-H power threshold in Alcator C-Mod
Invited Talk
Press Release from APS Meeting

APS 2004, Savannah, GA - Transport-driven scrape-off layer flows and the x-point dependence of the L-H power threshold in Alcator C-Mod
Invited Paper, Phys. Plasmas 12 (2005) 056111

PSI 2004, Portland, ME - Poloidal Transport Asymmetries, Edge Plasma Flows and Toroidal Rotation in Alcator C-Mod
Invited Talk

PSI 2004, Portland, ME - Plasma Profiles and Flows in the High-Field Side Scrape-off Layer in Alcator C-Mod
Contributed Poster

Transport-Driven Scrape-off Layer Flows and the Boundary Conditions Imposed at the Magnetic Separatrix in a Tokamak Plasma
Nucl. Fusion 44 (2004) 1047 (http://www.psfc.mit.edu/library/04ja/04JA017/04JA017_abs.html)

Scrape-off layer flows, magnetic topology and influence on the L-H threshold in a tokamak
Submitted to PRL January 21, 2004, rejected by PRL June 2, 2004 (http://www.psfc.mit.edu/library/04ja/04JA016/04JA016_abs.html)

ITERPhysics Basis Contribution - Cross-field Particle Transportin the Edge Plasma of Tokamak Experiments and Implications for ITER Operation
Report (http://www.psfc.mit.edu/library/03rr/03RR008/03RR008_abs.html)

APS 2003, Albuquerque, NM - Evidence for Electromagnetic Fluid Drift Turbulence Controlling the Edge Plasma State in Alcator C-Mod
Contributed Oral

APS 2003, Albuquerque, NM - Plasma Profiles and Flows in the High-Field Scrape-off Layer in Alcator C-Mod
Contributed Poster

In-Situ Gas Conductance and Flow Measurements Through Alcator C-Mod Divertor Structures With and Without Plasma Present
Report (http://www.psfc.mit.edu/library/03rr/03RR006/03RR006_abs.html)

IAEA2002, Lyon, France - Density Limit and Cross-Field Edge Transport Scaling in Alcator C-Mod
Talk - short version
Talk - full version
Paper (also see: http://www.iaea.org/programmes/ripc/physics/fec2002/html/fec2002.htm)

PSI 2002,Gifu, Japan - Toroidal rotation as an explanation for plasmaflow observations in the Alcator C-Mod scrape-off layer
Poster Presentation
Paper (published in J. Nucl. Mater.)

Analysis of fluctuation-driven particle fluxes measured by probes
Paper - Physics of Plasmas 9 (2002)

APS 2001, Long Beach, CA - Phenomenology and Scaling of Cross-Field Plasma Transport in the Alcator C-Mod Edge Plasma
Contributed poster

IAEATechnical Committee Meeting on DIVERTOR CONCEPTS September 11-14,2001, Aix-en-Provence, France: - Cross-field Plasma Transport inthe Scrape-off Layer: A key physics issue for SOL, divertor and coreplasma
Invited_Review Talk

Plasma Fluctuations in the 'Far SOL'
Paper - Physics of Plasmas 8 (2001) 3702

Workshop on Plasma Turbulence and Transport in Edge/SOL Regions 14-15 May, 2001, Fairbanks, Alaska - Particle Transport in the Alcator C-ModScrape-off Layer
Talk

APS 2000, Quebec City, Canada - Particle transport in the scrape-off layer and relationship to discharge density limit in Alcator C-Mod
Invited Talk
Paper - Physics of Plasmas 8 (2001) 2107
Press Release

PSI 2000, Rosenhiem, Germany - Cross-Field Plasma Transport and Main Chamber Recycling in Diverted Plasmas on Alcator C-Mod
Invited Talk
Paper - Nuclear Fusion 40 (2000)

APS 1999, Seattle, WA - Cross-Field Particle Transport through the Separatrix and Scrape-off Layer in Alcator C-Mod
Contributed Oral

Shoelace Antenna

APS 2013, Denver, CO: "External excitation of a short-wavelength fluctuation in the Alcator C-Mod edge plasma and its relationship to the quasi-coherent mode"
A driftwave-like perturbation is externally driven in the tokanak edge plasma for the first time.
Invited Paper, Phys. Plasmas 21 (2014) 056111
Invited Talk
Press Release

Initial Results of the Alcator C-Mod Quasi-Coherent Mode Antenna
T. Golfinopolous, APS2012 Poster.

A 'Shoelace' Antenna System for Direct Excitation of C-Mod's Quasi-Coherent Mode (QCM) and Boundary Layer Turbulence
B. LaBombard, APS2011 Poster.

Mirror Langmuir Probe Development

"New insights on scrape-off layer profiles and turbulence in Alcator C-Mod enabled by high resolution measurements with a scanning Mirror Langmuir Probe"
Invited presentation at the 21st Joint EU-US TTF Meeting 5 – 8 September 2016, Leysin, Switzerland.
Abstract
Talk

APS 2013, Denver, CO: "New insights on boundary plasma turbulence and the Quasi-Coherent Mode in Alcator C-Mod using a Mirror Langmuir Probe"
The QCM is unambiguously identified as an electron drift-wave with significant interchange drive and EM contributions.
Invited Paper, Phys. Plasmas 21 (2014) 056108
Invited Talk
Press Release

A "Mirror Langmuir Probe" is Being Developed -- A Powerful New Technique to Measure Boundary n, Te, Phi Profiles and Turbulence
APS2012 Contributed Oral.

Mirror Langmuir probe: A technique for real-time measurement of magnetized plasma conditions using a single Langmuir electrode
Rev. Sci. Instrum. 78 (2007) 073501.

Construction and operation of a Mirror Langmuir Probe Diagnostic for the Alcator C-Mod Tokamak
L. Lyons Master's Thesis, 2007.

Novel Langmuir Probe Arrays

Design and operation of a high-heat flux, flush-mounted "rail" Langmuir probe array on Alcator C-Mod.
A.Q. Kuang et al., Nuclear Materials and Energy 12 (2017) 1231.

DENSEPACK: an array of Langmuir probes in the limiter shadow plasma of the Alcator C Tokamak fusion experiment.
Rev. Sci. Instrum. 57 (1986) 2415.

Scanning Probes

Linear servomotor probe drive system with real-time self-adaptive position control for the Alcator C-Mod tokamak.
D, Brunner et al., Rev. Sci. Instrum. 88 (2017) 073501.

A novel tracer-gas injection system for scrape-off layer impurity transport and screening experiments.
Journal of Nuclear Materials 266 (1999) 571.

Edge Plasma Flow Diagnostic Development

Plasma Flows in the Alcator C-Mod Scrape-off Layer.
N. Smick Doctoral Thesis, 2009.

(WASP) Wall scanning probe for high-field side plasma measurements on Alcator C-Mod.
Rev. Sci. Instrum. 80, 023502 (2009).

Ion Temperature Probes

Space charge limits of ion sensitive probes.
D Brunner et al Plasma Phys. Control. Fusion 55 125004 (2013)

Scanning retarding field analyzer for plasma profile measurements in the boundary of the Alcator C-Mod tokamak.
D. Brunner, et al., Rev. Sci. Instrum. 84 , 033502 (2013).

Scanning ion sensitive probe for plasma profile measurements in the boundary of the Alcator C-Mod tokamak.
D. Brunner, et al., Rev. Sci. Instrum. 84 , 053507 (2013).

Development of Probes for Assessment of Ion Heat Transport and Sheath Heat Flux in the Boundary of the Alcator C-Mod Tokamak.
D. Brunner, Doctoral Thesis, 2013.

Surface Thermocouples

Novel Surface Thermocouple Probes for Divertor Heat Flux Measurement
S. Gangadhara et al., Bull. Am. Phys. Soc. 41 (1996) 1550

Surface thermocouples for measurement of pulsed heat flux in the divertor of the Alcator C-Mod tokamak
Verification of Plasma-Sheath Heat Transfer Physics using Surface Thermocouple Diagnostic
D. Brunner and B. LaBombard, Rev. Sci. Instrum. 83 (2012) 033501

Edge Plasma Ion Mass Spectroscopy

Omegatron Ion Mass Spectrometer - Review of Scientific Instruments 71 (2000) 4107:

Omegatron Ion Mass Spectrometer for the Alcator C-Mod Tokamak

Helium-3 Transport Experiments with Omegatron - Physics of Plasmas 7 (2000) 4573:

Helium-3 Transport Experiments in the Scrape-Off Layer with the Alcator C-Mod Omegatron Ion Mass Spectrometer

Impurity Dispersal 'Plume' Experiments

Impurity Plume Experiments: physics and detailed modeling - Plasma Phys. Control. Fusion 46 (2004) 1617.

Impurity plume experiments in the edge plasma of the Alcator C-Mod Tokamak

Impurity Dispersal 'Plumes' - Journal of Nuclear Materials 290-2939 (2001) 598

Impurity Transport Experiments in the Edge Plasma of Alcator C-Mod using Gas Injection Plumes

Novel Tracer Gas Injecting Probe System - Journal of Nuclear Materials 266-269 (1999) 571

A novel tracer-gas injection system for scrape-off layer impurity transport and screening experiments

Miniature Penning Gauges

"The Design and Construction of Miniature, High-Pressure, Penning Ionization Gauges for Alcator C-Mod"
PSFC/RR-15-12

Alcator C-Mod Cryopump Development

Design, installation and commissioning of the upper divertor cryopump system in Alcator C-Mod
PSFC/RR-08-06

APS 2007, Orlando, FL - Design and operation of a novel cryopumping system in Alcator C-Mod
Contributed Poster

1-D Space,2-D Velocity Kinetic Neutral Transport Code written in IDL*

PSFC Research Report: PSFC/RR-01-9 (KN1D.pro)

KN1D: A 1-D Space, 2-D Velocity, Kinetic Transport Algorithm for Atomic and Molecular Hydrogen in an Ionizing Plasma

KN1D source code can be found here

PSFC Research Report: PSFC/RR-00-9 (Kinetic_Neutrals.pro)

A 1-D Space, 2-D Velocity, Kinetic Neutral Transport Algorithm

* IDL is a trademark of Research Systems, Inc., Boulder, CO

Last Revised: 11/09/2017