Intense Diagnostic Neutral Beam For Burning Plasmas Challenges for ITER and Opportunities for KSTAR Jaeyoung Park Glen Wurden and MFE team Los Alamos National.

Slides:



Advertisements
Similar presentations
Ion Heating and Velocity Fluctuation Measurements in MST Sanjay Gangadhara, Darren Craig, David Ennis, Gennady Fiskel and the MST team University of Wisconsin-Madison.
Advertisements

Introduction to Plasma-Surface Interactions Lecture 6 Divertors.
Seminar on Plasma Focus Experiments 2012,(SPFE2012), 12 th July 2012 S H Saw Ion Beams and Plasma Streams- some results from numerical experiments- Ion.
Henrik Loos LCLS FAC Meeting 27 October RF Gun Status LCLS Facility Advisory Committee Meeting October 26, 2005 Mechanical.
FES International Collaboration Program: Vision and Budget Steve Eckstrand International Program Manager Office of Fusion Energy Sciences U.S. Department.
Normal-Conducting Photoinjector for High Power CW FEL Sergey Kurennoy, LANL, Los Alamos, NM, USA An RF photoinjector capable of producing high continuous.
JYFLTRAP: Spectroscopy with multi-trap facility Facility Mass purified beams In-trap spectroscopy Future plans.
Runaway Electron Mitigation Collaboration on J-TEXT David Q. Hwang UC Davis Sixth US-PRC Magnetic Fusion Collaboration Workshop Collaborating Institutions:
PSSC Space Instrument Laboratory Plasma instrument calibration system provides an ion beam of energy range up to 130keV/charge in a clean room To develop.
Diagnostics for Benchmarking Experiments L. Van Woerkom The Ohio State University University of California, San Diego Center for Energy Research 3rd MEETING.
A U.S. Department of Energy Office of Science Laboratory Operated by The University of Chicago Argonne National Laboratory Office of Science U.S. Department.
49th Annual Meeting of the Division of Plasma Physics, November , 2007, Orlando, Florida Ion Temperature Measurements and Impurity Radiation in.
A Materials Evaluation Neutron Source Based on the Gas Dynamic Trap (DTNS) One Element in an Urgently Needed Comprehensive Fusion Materials Program Based.
D. Borba 1 21 st IAEA Fusion Energy Conference, Chengdu China 21 st October 2006 Excitation of Alfvén eigenmodes with sub-Alfvénic neutral beam ions in.
Measurements with the KSTAR Beam Emission Spectroscopy diagnostic system Máté Lampert Wigner Research Centre for Physics Hungarian Academy of Sciences.
Carbon Injector for FFAG
HYBRIS: R. Keller Page 1 A Hybrid Ion Source Concept for a Proton Driver Front-End R. Keller, P. Luft, M. Regis, J. Wallig M. Monroy, A. Ratti, and.
Ursel Fantz for the IPP-NNBI Team 16 th ICIS, New York City, USAAugust 23-28, 2015 Towards 20 A Negative Hydrogen Ion Beams for Up to 1 hour: Achievements.
Plans for injection/extraction R&D S. Guiducci INFN-LNF KEK - ILCDR07, Dec 207.
Generation and Characterization of Magnetized Bunched Electron Beam from DC Photogun for MEIC Cooler Laboratory Directed Research and Development (LDRD)
Negative Ions in IEC Devices David R. Boris 2009 US-Japan IEC Workshop 12 th October, 2009 This work performed at The University of Wisconsin Fusion Technology.
FETS H - Ion Source Experiments and Installation Scott Lawrie, Dan Faircloth, Alan Letchford, Christoph Gabor, Phil Wise, Mark Whitehead, Trevor Wood,
Low Emittance RF Gun Developments for PAL-XFEL
Operated by Los Alamos National Security, LLC for the U.S. Department of Energy’s NNSA U N C L A S S I F I E D Slide 1 Dynamic Electron Injection for Improved.
Pellet Charge Exchange Measurement in LHD & ITER ITPA Tohoku Univ. Tetsuo Ozaki, P.Goncharov, E.Veschev 1), N.Tamura, K.Sato, D.Kalinina and.
Brent Stratton for the NCSX Team Princeton Plasma Physics Laboratory Oak Ridge National Laboratory NCSX Program Advisory Committee Meeting #8 Princeton.
EBIS ARR Jim Alessi May 4- 7, 2010 Technical Overview.
A mass-purification method for REX beams
Status Report of the LISOL Laser Ion Source Yu.Kudryavtsev, T.Cocolios, M.Facina, J.Gentens, M.Huyse, O.Ivanov, D.Pauwels, M.Sawicka, P.Van den Bergh,
Observations of electrons in the Intense Pulse Neutron Source (IPNS) Rapid Cycling Synchrotron (RCS) J. C. Dooling, F. R. Brumwell, W. S. Czyz, K.C. Harkay,
Accelerator Science and Technology Centre POST-LINAC BEAM TRANSPORT AND COLLIMATION FOR THE UK’S NEW LIGHT SOURCE PROJECT D. Angal-Kalinin,
FLAIR meeting, GSI March Positron Ring for Antihydrogen Production A.Sidorin for LEPTA collaboration JINR, Dubna.
Project X RD&D Plan Beam Transfer Line and Recycler Injection David Johnson AAC Meeting February 3, 2009.
Accelerator Science and Technology Centre POST-LINAC BEAM TRANSPORT AND COLLIMATION FOR THE UK’S NEW LIGHT SOURCE PROJECT D. Angal-Kalinin,
LDRD: Magnetized Source JLEIC Meeting November 20, 2015 Riad Suleiman and Matt Poelker.
Electron Beam Deposition Into the KrF Laser Gas
RF source, volume and caesiated extraction simulations (e-dump)
Steady State Discharge Modeling for KSTAR C. Kessel Princeton Plasma Physics Laboratory US-Korea Workshop - KSTAR Collaborations, 5/19-20/2004.
Status and Plans for Systems Modeling for Laser IFE HAPL Progress Meeting November 2001 Pleasanton, CA Wayne Meier, Charles Orth, Don Blackfield.
GOLEM operation based on some results from CASTOR
045-05/rs PERSISTENT SURVEILLANCE FOR PIPELINE PROTECTION AND THREAT INTERDICTION Taming The Physics For Commercial Fusion Power Plants ARIES Team Meeting.
1 Electra Foil Heating Analysis D. V. Rose, a F. Hegeler, b A. E. Robson, c and J. D. Sethian c High Average Power Laser Meeting PPPL, Princeton, NJ October.
WU2 - Proton Source Istituto Nazionale di Fisica Nucleare Laboratori Nazionali del Sud.
Electron Sources for ERLs – Requirements and First Ideas Andrew Burrill FLS 2012 “The workshop is intended to discuss technologies appropriate for a next.
Developments of the FETS Ion Source Scott Lawrie.
Solenoid Free Plasma Start-up Mid-Run Summary (FY 2008) R. Raman and D. Mueller Univ. of Wash. / PPPL 16 April 2008, PPPL 1 Supported by Office of Science.
Charge Exchange Spectroscopic Diagnostic for the TJ-II José Miguel Carmona Torres Laboratorio Nacional de Fusion EURATOM-CIEMAT.
SCU 3-Lab Review Meeting, Dec. 16, 2014 SCU Presentations Today Intro. & Performance Motivations (P. Emma, SLAC, 20+5) Conceptual Cryostat Design: Option-A.
The International Workshop on Thin Films. Padova 9-12 Oct of slides Present Status of the World- wide Fusion Programme and possible applications.
1 NSTX EXPERIMENTAL PROPOSAL - OP-XP-712 Title: HHFW Power Balance Optimization at High B Field J. Hosea, R. Bell, S. Bernabei, L. Delgado-Aparicio, S.
September 13, 2007 J. Alessi EBIS Project and EBIS as an ionizer for polarized He-3 ? Jim Alessi Work of E. Beebe, A. Pikin, A. Zelenski, A. Kponou, …
CERN, 27-Mar EuCARD NCLinac Task /3/2009.
Development of a Single Ion Detector for Radiation Track Structure Studies F. Vasi, M. Casiraghi, R. Schulte, V. Bashkirov.
Development of High Current Bunched Magnetized Electron DC Photogun MEIC Collaboration Meeting Fall 2015 October 5 – 7, 2015 Riad Suleiman and Matt Poelker.
RF System and EBIS of RAON
Target Proposal Feb. 15, 2000 S. Childress Target Proposal Considerations: –For low z target, much less power is deposited in the target for the same pion.
56 th Annual Meeting of the Division of Plasma Physics. October 27-31, New Orleans, LA Using the single reservoir model [3], shown on right, to:
Using step-like nonlinear magnets for beam uniformization at target in high intensity accelerarors Zheng Yang, Jing-Yu Tang, IHEP, China P.A. Phi Nghiem,
Understanding Extraction And Beam Transport In The ISIS H - Ion Source D. C. Faircloth, A.P Letchford, C. Gabor, S. Lawrie M. O. Whitehead and T. Wood.
Insert Chart, Photo or Image
Study on IFMIF Beam-Target Interface
Zheng Yang, Jing-Yu Tang, IHEP, China
Adriana Rossi, Sergey Sadovich
Beam Dump outline work plan (UK perspective)
H- Ion Source Development
Status of Equatorial CXRS System Development
Advanced Research Electron Accelerator Laboratory
Progress report on PIC simulations of a neutralized electron beam
X-Ray Transport, Optics, and Diagnostics WBS Alan J
Plans for future electron cooling needs PS BD/AC
Presentation transcript:

Intense Diagnostic Neutral Beam For Burning Plasmas Challenges for ITER and Opportunities for KSTAR Jaeyoung Park Glen Wurden and MFE team Los Alamos National Laboratory US-Korea workshop, Sad Diego, May 19, 2004 Presented at the US ITER Forum, Univ.. of Maryland, May 8, 2003

Why IDNB? Upcoming burning plasma experiments (ITER or FIRE) Intense diagnostic neutral beam (IDNB): Critical baseline diagnostics for burning plasma experiments. - CHarge Exchange Recombination Spectroscopy (CHERS): ion temperature profile, impurity and helium ash measurements and fast alpha distribution. - Motional Stark Effect (MSE): current profile (q-profile). Current technology on diagnostic neutral beam: unlikely to work on burning plasmas due to beam penetration, increased background noise -> low S/N. Intense (~ 100 A/cm 2 ) pulsed beam: better S/N. LANL has hardware, history and expertise (since 90s) and personnel for pulsed IDNB source R&D.

Existing IDNB Hardware at LANL

Conventional DNB in burning plasmas? How well will it work? Burning plasmas: higher electron density and larger plasma dimension --> beam penetration problem Visible background bremsstrahlung: main source of noise and increase with radius and n e 2 (while CHERS signal increase with n e ) Increasing beam intensity: very costly in CW beam. Proposed ITER heating beam: H - based at 500 keV vs. ~125 keV for optimal beam energy for CHERS (need for DNB)

Bremsstrahlung vs. CER signal levels for CW beam - Low S/N ratio especially in the core region * Full-sized ITER Calculations by Dan Thomas, 1997 Varenna Workshop From ITER data base: T e ~ keV flat N e ~ 1x10 14 cm -3 Beam energy = 125 keV/AMU Beam current of 40 A (CW) Beam area of 20 cm x 20 cm

Pulsed Ion Diode Neutral Beam (IDNB) Since energy is fixed, consider increasing current. Magnetically Insulated Diode (MID) technologies can be used to create intense, pulsed beams at the requisite energy. S/N improved by : –synchronous gating on detection system. –comparable CER and VB signals require smaller dynamic range from detection system. Assumptions:CW beam –beam diameter =.2m x.2m –initial beam intensity = 1.0 x 10 3 A/m 2 Assumptions: pulsed beam –beam diameter =.2m x.2m –initial beam intensity = 1.0 x 10 6 A/m 2 –pulse length= 1  s –gate time = 2  s –pulses per second= 30 (300) Dan Thomas (GA) ran a comparison of CW and Pulsed DNB systems for the original ITER (Varenna 1997 Workshop)

Pulsed IDNB yields much larger signals* and could work in the core region * Full-sized ITER Calculations by Dan Thomas, 1997 Varenna Workshop

Technical approach Intense ion beam source: Magnetically Insulated Diode (MID) -beam extraction over Child-Langmuir (CL) limit (~ 100 times) Plasma anode: clean beam with long lifetime Repetitive pulse operation: short pulses (1-2  s) with high rep-rate (~ 30 Hz) - improve S/N ratio with low cost. Optimal beam 125 keV/amu for CHERS. Independent from neutral heating beam. Potential show stoppers Beam divergence: 1˚ or less divergence required. Not yet proven with MID with plasma anode at high beam extraction. Lifetime issue: 10,000 shots or more. May not be compatible with high beam extraction (~ 100 times CL limit), high power (~ 4 GW peak power), low beam divergence, etc. Repetition rate: gas handling and cooling requirement. LANL IDNB Proposal

Magnetically insulated diode (MID) basic Transverse magnetic fields in A-K gap - provide insulation and charge neutralization Critical magnetic field (B*): required B-field for electron sheath = A-K gap - B* ~ 1.3 kG for 1.5 cm 250 kV. If B >>B* or B <<B*: j ion limited by space charge -j ion ~ 2A/ cm 2 for D 0 ion. When B ~ B*: ion current enhancement over CL limit - required current density: > 100A/ cm 2 for D 0 ion. - enhancement factor of ~ 100 was obtained (by Ueda et al. in 1993) for H 0 ion beam. Beam extraction will be done in the cathode opening B Anode Plasma Cathode Ions Electrons Electron sheath

IDNB ITER- relevant parameters Critical issue 

In relation to ITER Beam divergence, gas handling and repetition rate, lifetime and reliability - all critical issues for IDNB performance KSTAR is a logical choice for IDNB demonstration and deployment Successful operation of IDNB ensures the critical diagnostic capability for ITER Specific to KSTAR High S/N ratio and excellent spatial resolution Diagnostic flexibility (independent of NBI) Low power consumption ( Hz) and small footprint Opportunities for KSTAR

IDNB R&D (2-3 years) - LANL lead FY 06 funding requested MID operation and performance optimization - High beam extraction (~ 100 x CL limit) - Low beam divergence (5-10 mrad) - Lifetime (~ 100,000 shots) - Optimize the repetition rate ( Hz) Design tool for MID system - 2D fluid + PIC simulation Deployment and Demonstration (2-3 years) - KSTAR lead Prototype construction and installation - Beam neutralization (gas handling and pumping requirement) specific to KSTAR DNB capability to KSTAR IDNB performance demonstration for ITER Project scope and expected schedule

Proposal Title: Intense Diagnostic Neutral Beam For Burning Plasmas Pulsed Ion Source - Magnetically Insulated Diode Proposal Objective: FESAC panel on “A Burning Plasma Program Strategy to Advance Fusion Energy”: 2nd highest priority “ to develop enabling technology that supports the burning plasma research and positions the US to more effectively pursue burning plasma research” The highest priority for US contributions to the ITER project: “baseline diagnostics, plasma control, remote research tools, etc.” Intense diagnostic neutral bea (IDNB): Critical baseline diagnostics for CHERS and MSE - ion temperature profile, impurity and helium ash measurements, fast alpha distribution., and q profile. Intense (~ 50 A/cm 2 ), pulsed beam: better S/N and cost efficient. LANL has hardware, history & expertise (since 90s) and personnel for pulsed IDNB source R&D. Expected Cost and Schedule: Task 1: 24 month effort headed up by LANL - P24 (outside collaboration on modeling) ~$1.2 M/yr Task 2: 24 month effort headed up by LANL - P24 (collaboration with major fusion facility) ~ $1.2M/yr Total: $4.8M over 48 months Deliverables: Task 1&2: Technical reports on bulleted items and a numerical design tool for IDNB MID. Task 2: Prototype intense diagnostic neutral beam for deployment. Contact Information: Proposed Technical Approach: Intense ion beam source: magnetically insulated diode (MID) with anode plasma for clean, intense (~ 50 A/cm 2 ) neutral beam Repetitive pulse operation: short pulses (1-2  s) with high rep- rate (~ 30 Hz) to improve S/N ratio with low cost. Optimal beam energy of 125 keV/amu for CHERS and MSE. Low beam divergence: 1˚ divergence with modified electrodes and additional electric quadrupole beam shaping. Task 1: Characterization and optimization of MID Operation MID facility (CHAMP) at LANL High beam extraction ( times Child-Langmuir limit) Modeling of MID (two-fluid and PIC simulation). Task 2: Deployment of prototype diagnostic beam Parallel beam extraction with electrode modification. Efficient neutralization and high rep-rate Deployment ready at major fusion facility in 4 years Dr. Jaeyoung Park and Dr. Glen Wurden Plasma Physics Group (P-24), MS E-526 Los Alamos National Laboratory, Los Alamos, NM Tel) , ) and