Below is the summary of the Prioritization Meeting for Integrated Scenarios (H-mode Baseline) task, held Jan 5, 2007, based on my notes. Participants should send corrections or revisions to me as necessary. We identified 8 days for nine High Priority experiments. Since the preliminary allocation is five days, some additional prioritization may be required. These include 0.5 days at 50MHz and one day in reversed field. At least four days call for use of the cryopump and at least four days require high power (>4MW) ICRF. We also designated several Ideas be combined or piggybacked, and recommended some to be considered by other task groups. Additional Ideas listed as Medium priority could be considered as contingency. Originators of Ideas rated High Priority should begin preparation of MiniProposals as noted below. MP's for Ideas ranked Medium priority will also be entertained. In cases where we recommended combining experiments or support of specific piggyback activities, the MP and/or Run Plan should accommodate those requirements. If the recommended combinations are not feasible, please communicate this to me (and the principals involved) ASAP. ****************************************************************************** * The following Ideas and Open MiniProposals were designated "High" priority:* ****************************************************************************** 2007-901 Marmar: Evaluation of Integrated Performance at high current (>1.5MA) and High Power (>5MW). 1 day of High priority was assigned to the experiment at the ITER field of 5.3T. If possible, the experiment should attempt to access ELMy H-mode regime at low collisionality, using the cryopump. The pre-requisite shape development at high elongation and normalized current (MP#362) should be attempted during pre-physics operation, and/or in combination with Idea #110 (Ferrara - Optimization of control gains of the fast vertical channel, Operations Group). 2007-903 Snipes: Scaling of the L-H transition at low density 1 day This experiment, which responds to a likely ITER Issue Cards LH-2 and AUX-11, requires successful operation of the cryopump in the L-mode target, edge/pedestal diagnostics, and adequate (but not extreme) ICRF power. 2007-904 Hughes: H-mode density control and pedestal profile response to cryopumping 1 day of this experiment, which is a pre-requisite for all H-mode cryopump-based experiments, is assigned high priority. Multiple piggyback experiments should be possible (assuming success) and the plan should accommodate these. 2007-906 Terry: Effect of plasma shape and collisionality on ELMs 1 day assigned high priority, to be combined with Idea #908 "ELM control using the error correction coils (Whyte)". Requires use of the cryopump in H-mode and high ICRF power (78/80/80.5 MHz). ELM pacing using LHCD is of lower priority. Note: this Idea supersedes MP#451. A new MP (or revision) should be written (Terry). A separate MP should be generated for the ELM control part of the experiment(Whyte). 2007-907 Terry: ELM structure and energetics 1 day (reverse field upper null) assigned high priority. This experiment requires successful operation of the cryopump in controlling density of upper null discharges, and high power ICRF. Related to MP#458, new or revised MP should be prepared (Terry). 2007-911 Ince-Cushman: B-field scan for intrinsic rotation database. 0.5 day of dedicated time at low-field, 50MHz is assigned high priority. The 8T portion of the experiment should be combined with 0.5 day of MP#410 "Extension of Pedestal Scalings (Hughes)". Additional run-time to be obtained in piggyback, and should also support initial qualifying experiments for Idea #910 "Joint experiments with JET on non-resonant n=2 magnetic braking (Hender)". This experiment does not require the cryopump. 2007-912 deGrassie: Continue C-Mod/DIII-D similarity experiments on intrinsic rotation 1 day assigned as high priority. This experiment is a continuation of MP#425; preparation of a new MP is optional. Identification of highest priority target plasma is pending (2-3 possibilities included in Idea). Should be coordinated with other rotation experiments, including Idea #911 (see previous), as possible. This experiment does not require the cryopump. MP#448 Maingi: Comparison of small ELM regimes on C-Mod/MAST/NSTX 1 day to assigned high priority to complete experiments begun in 2006. Requires high ICRF power, effective boronization. Does not require cryopump. New MP NOT required. MP#410 Hughes: Extension of pedestal scalings 0.5 days at 8T assigned high priority to complete pedestal scaling dataset. Experiment should be designed to accommodate piggyback/combination with high field portion of Idea #911 "B-field scan for intrinsic rotation database (Ince-Cushman)". These experiments probably do not require the cryopump. **************************************************************************** * Disposition of other Ideas and MP's was as follows: * **************************************************************************** 2007-902 Hubbard: Developing techniques for compatibility of high-power ICRF and boronization Recommended to Operations, perhaps to be combined with Idea#103 "Maximizing the effect of boronization through plasma shape changes (Lipschultz)". 2007-904 Greenwald: Gas fueling at the ITER neutral opacity Medium priority. Likely fill-in experiment for ohmic operation during ICRF outages. 2007-908 Whyte: ELM control using error-field correction coils Combined with high priority #906 "Effect of plasma shape and collisionality on ELMs (Terry)" 2007-909 Whyte: Tau He* measurements with fluid neutrals regime divertor Rated Medium to Low for this task. Recommended to Edge/Divertor as more appropriate topic. 2007-910 Hender: Joint experiments with JET on non-resonant n=2 magnetic braking. Rated Medium priority, with proof-of-principle to be combined into #911 (or other rotation experiment), pending resolution of n=4 and higher spectral components question. Recommended for strong consideration in MHD topic. Noted that ITER impact is primarily concerned with high beta phase (RWM rotation issues), but AT Integrated Scenarios task is even more constrained than H-mode baseline. MP#362 Wolfe: Shaping and Control developmenet for high elongation, high I_N equilibria. Time in support of #901 "Integrated performance at high current and power (Marmar)" to be undertaken during pre-physics phase and/or in conjunction with #110 Operations experiment. MP#392 Snipes: C-Mod/JET identity nu* scan at high beta Medium priority. Probably requires cryopump for density control in H-mode. JET will not do additional work, publication based on earlier result already in print. Remains of interest, but less urgency. MP#382 Hubbard/Maddison: C-Mod/JET dimensionless identity at high field/current. Medium priority based on likelihood that JET will not conduct their part of the Joint Experiment this year. Requires high ICRF power, does not require cryopump. Priority could be enhanced if JET plans are revised. MP#458 Terry: Type, filament structure and pacing of ELMs in high beta plasmas Superseded by Idea 907 MP#451 Terry: Structure and stability of large Type I ELMs Superseded by Idea 906 MP#423 Petty: C-Mod/JET rho* scan along an ITER-relevant path Medium priority. Requires cryopump for access to low collisionality, high power RF and/or 50MHz operation. MP#395 Granetz: Dimensionless comparison of NTM threshold Medium priority. Probably requires cryopump, definitely high power ICRF. Could be considered by MHD Group. MP#432 Granetz: TAEs and RF tail losses Medium priority. Requires CNPA unless effect is large. May requre re-tuning FMIT#1 or 2 for 400kHz beat wave. Probably does not require cryopump(?) MP#452 Hughes: Reverse field pedestal studies. Medium priority. Requires reverse field. 2005-116 Politzer: Burn Control simulation with ICRH Medium priority. Requires significant (but feasible) DPCS hardware/software development. Requires high ICRF power. Does not require cryopump. 2005-112 Wukitch: High li discharges with near-axis MCCD Assessed as NOT TECHNICALLY FEASIBLE. -- Stephen M. Wolfe M.I.T. Plasma Science and Fusion Center Room NW17-101 175 Albany Street Cambridge, MA 02139 telephone: (617) 253-5510 fax: (617) 253-0627 e-mail: wolfe@psfc.mit.edu _______________________________________________