Publications

Review of Scientific Instruments

Webb, Timothy J.; Ampleford, David A.; Ball, Christopher R.; Gomez, Matthew R.; Lake, Patrick W.; Maurer, A.; Presura, Radu

We have commissioned a new time-resolved, x-ray imaging diagnostic for the Z facility. The primary intended application is for diagnosing the stagnation behavior of Magnetized Liner Inertial Fusion (MagLIF) and similar targets. We have a variety of imaging systems at Z, both time-integrated and time-resolved, that provide valuable x-ray imaging information, but no system at Z up to this time provides a combined high-resolution imaging with multi-frame time resolution; this new diagnostic, called TRICXI for Time Resolved In-Chamber X-ray Imager, is meant to provide time-resolved spatial imaging with high resolution. The multi-frame camera consists of a microchannel plate camera. A key component to achieving the design goals is to place the instrument inside the Z vacuum chamber within 2 m of the load, which necessitates a considerable amount of x-ray shielding as well as a specially designed, independent vacuum system. A demonstration of the imaging capability for a series of MagLIF shots is presented. Predictions are given for resolution and relative image irradiance to guide experimenters in choosing the desired configuration for their experiments.

Looker, Quinn M.; Wood, Michael G.; Serkland, Darwin K.; Lake, Patrick W.; Finnegan, Patrick S.; Sanchez, Marcos O.; Porter, John L.

Abstract not provided.

Kao, Malia L.; Loisel, Guillaume P.; Bailey, James E.; Lake, Patrick W.; Gard, Paul D.; Rochau, G.A.

Abstract not provided.

Yates, Kevin C.; kim, yongho k.; Herrmann, Hans H.; Meaney, Kevin M.; jorgenson, justin j.; Chandler, Gordon A.; Lake, Patrick W.; Ball, Christopher R.; Jones, Michael J.; Spencer, Decker C.; Mckenney, John M.; Grim, Gary G.; Hahn, Kelly D.; Khater, Hesham K.; Sitaraman, Shiva S.; Kaufman, Morris K.; Corcoran, James C.; McGillivray, Kevin M.; Moy, Ken M.

Abstract not provided.

Fein, Jeffrey R.; Ampleford, David A.; Vogel, J.K.V.; Kozioziemski, B.J.; Walton, C.C.W.; Wu, Ming W.; Ayers, J.A.; Ball, Christopher R.; Romaine, S.R.; Bell, Perry M.; Bourdon, Christopher B.; Bradley, Dalton A.; Bruni, R B.; Gard, Paul D.; Highstrete, Clark H.; Kilaru, K.K.; Lake, Patrick W.; Maurer, A.; Pickworth, L.A.P.; Pivovaroff, M.J.; Ramsey, B.R.; Ritter, Brian J.; Seals, Kathryn L.; Sethares, L S.

Abstract not provided.

Webb, Timothy J.; Ampleford, David A.; Gomez, Matthew R.; Ball, Christopher R.; Lake, Patrick W.; Maurer, A.; Presura, Radu P.

Abstract not provided.

Fein, Jeffrey R.; Ampleford, David A.; Vogel, J.K.V.; Kozioziemski, B.J.; Walton, C.C.W.; Wu, Ming W.; Ayers, J.A.; Ball, Christopher R.; Romaine, S.R.; Bell, Perry M.; Bourdon, Christopher B.; Bradley, Dave B.; Bruni, R B.; Gard, Paul D.; Highstrete, Clark H.; Kilaru, K.K.; Lake, Patrick W.; Maurer, A.; Pickworth, L.A.P.; Pivovaroff, M.J.; Ramsey, B.R.

Abstract not provided.

Fein, Jeffrey R.; Ampleford, David A.; Vogel, Julia K.; Kozioziemski, Bernie J.; Walton, Christopher C.; Ames, Andrew O.; Ayers, Jay J.; Ball, Christopher R.; Bourdon, Christopher B.; Bruni, Ricardo J.; Gard, Paul D.; Lake, Patrick W.; Maurer, A.; Pivovaroff, Michael P.; Ramsey, Brian D.; Romaine, Suzanne R.

Abstract not provided.

Fein, Jeffrey R.; Ampleford, David A.; Vogel, Julia K.; Kozioziemski, Bernie J.; Walton, Christopher C.; Wu, Ming W.; Ames, Andrew O.; Ayers, J.A.; Ball, Christopher R.; Bell, Perry M.; Bourdon, Christopher B.; Bradley, David K.; Bruni, R B.; Gard, Paul D.; Kilaru, K.K.; Lake, Patrick W.; Maurer, A.; Pickworth, Louisa A.; Pivovaroff, Michael P.; Ramsey, Brian D.; Roberts, Oliver J.; Romaine, Suzanne R.; Sullivan, Michael A.; Kirtley, Christopher K.

Abstract not provided.

Ampleford, David A.; Fein, Jeffrey R.; Vogel, J.K.V.; Kozioziemski, B.J.; Walton, C.C.W.; Wu, Ming W.; Ball, Christopher R.; A. Ames, J.A.; Bell, P.B.; Bourdon, Christopher B.; D. Bradley, R.B.; Dunham, Gregory S.; Gard, Paul D.; Johnson, Drew J.; Kilaru, K.K.; Lake, Patrick W.; Maurer, A.; Nielsen-Weber, Linda B.; Pickworth, L.A.; Pivovaroff, M.J.; Ramsey, B.R.; Roberts, O.J.R.; Sullivan, Michael A.; Rochau, G.A.

Abstract not provided.

Lake, Patrick W.; Wu, Ming W.; Loisel, Guillaume P.; Ampleford, David A.; Nielsen-Weber, Linda B.; Dunham, Gregory S.

Abstract not provided.

Ball, Christopher R.; Ampleford, David A.; Gard, Paul D.; Maurer, A.; Bourdon, Christopher B.; Fein, Jeffrey R.; Wu, Ming W.; Lake, Patrick W.; Nielsen-Weber, Linda B.; Dunham, Gregory S.; Johnson, Drew J.; Johns, Owen J.; Sullivan, Michael A.; Kirtley, Christopher K.; Kozioziemski, B.J.; Pickworth, L.A.P.; Vogel, J.K.V.; Pivovaroff, M.JP.; Walton, C.C.W.; Ayers, J.A.; Bell, P.B.; Ramsey, B.R.; Romaine, S.R.

Abstract not provided.

Loisel, Guillaume P.; Lake, Patrick W.; Nielsen-Weber, Linda B.; Dunham, Gregory S.; Rochau, G.A.; Wu, Ming W.; Bailey, James E.

Abstract not provided.

Savage, Mark E.; Webb, Timothy J.; Garcia, M.R.; Lake, Patrick W.; Ormond, Eugene C.; Moore, James M.; Bennett, N.B.; Weber, T.W.; Olson, R.T.O.; Gall, B.G.; Sipe, N.S.; Molnar, S.M.; Gardner, S.G.; Schmidt, A.S.

Abstract not provided.

Harding, Eric H.; Hansen, Stephanie B.; Gomez, Matthew R.; Knapp, Patrick K.; Hahn, Kelly D.; Jennings, Christopher A.; Slutz, Stephen A.; Lake, Patrick W.; Awe, Thomas J.; Rochau, G.A.; Sullivan, Michael A.; Kirtley, Christopher K.; Doron, R.D.; Stambulchik, E.S.; Kuzminykh, Y.K.; Maron, Y.M.; Golovkin, Igor G.

Abstract not provided.

Bourdon, Christopher B.; Bailey, James E.; Vesey, Roger A.; Loisel, Guillaume P.; Dunham, Gregory S.; Hansen, Stephanie B.; Coverdale, Christine A.; Ampleford, David A.; Bell, Kate S.; Lake, Patrick W.

Abstract not provided.

ICOPS/BEAMS 2014 - 41st IEEE International Conference on Plasma Science and the 20th International Conference on High-Power Particle Beams

Johnston, Mark D.; Kiefer, Mark L.; Lake, Patrick W.; Bennett, N.; Droemer, D.W.; Maron, Yitzhak

Abstract not provided.

IEEE Transactions on Plasma Science

Harper-Slaboszewicz, V.H.; Leckbee, Joshua L.; Bennett, Nichelle; Madrid, Elizabeth A.; Rose, David V.; Thoma, Carsten; Welch, Dale R.; Lake, Patrick W.; McCourt, Andrew L.

A series of simulations and experiments to resolve questions about the operation of arrays of closely spaced small aspect ratio rod pinches has been performed. Design and postshot analysis of the experimental results are supported by 3-D particle-in-cell simulations. Both simulations and experiments support these conclusions. Penetration of current to the interior of the array appears to be efficient, as the current on the center rods is essentially equal to the current on the outer rods. Current loss in the feed due to the formation of magnetic nulls was avoided in these experiments by design of the feed surface of the cathode and control of the gap to keep the electric fields on the cathode below the emission threshold. Some asymmetry in the electron flow to the rod was observed, but the flow appeared to symmetrize as it reached the end of the rod. Interaction between the rod pinches can be controlled to allow the stable and consistent operation of arrays of rod pinches.

Ampleford, David A.; Jennings, Christopher A.; Jones, Brent M.; Hansen, Stephanie B.; Lake, Patrick W.; Rochau, G.A.; Bailey, James E.; Dunham, Gregory S.; Cuneo, M.E.; Coverdale, Christine A.; Bernshtam, V.B.; Fisher, V.F.; Zarnitsky, Y.Z.; Starobinets, A.S.; Weingarten, L.W.; Doron, R.D.

Abstract not provided.

Bell, Kate S.; Cuneo, M.E.; Lake, Patrick W.; Austin, Kevin N.; Coverdale, Christine A.; McPherson, Leroy A.; Harper-Slaboszewicz, V.H.; Ampleford, David A.; Jones, Brent M.; Kernaghan, M.D.; Bourdon, Christopher B.; Jones, Michael J.

Abstract not provided.

IEEE Transactions on Plasma Science

Leckbee, Joshua L.; Lake, Patrick W.; McCourt, Andrew L.

Abstract not provided.

Kiefer, Mark L.; Lake, Patrick W.; Johnston, Mark D.; Webb, Timothy J.; Leckbee, Joshua L.; Renk, Timothy J.; Oliver, Bryan V.; Mazarakis, Michael G.; Nielsen, D.S.; Ziska, Derek Z.

Abstract not provided.

Renk, Timothy J.; Oliver, Bryan V.; Harper-Slaboszewicz, V.H.; Derzon, Mark S.; Wiemann, Dora K.; Lake, Patrick W.; Brubaker, Erik B.; Gerling, Mark D.; Steele, John T.

Abstract not provided.

Review of Scientific Instruments

Gomez, Matthew R.; Rochau, G.A.; Bailey, James E.; Dunham, Gregory S.; Kernaghan, M.D.; Gard, P.; Robertson, Grafton K.; Owen, A.C.; Argo, J.W.; Nielsen, D.S.; Lake, Patrick W.

The pinned optically aligned diagnostic dock (PODD) is a multi-configuration diagnostic platform designed to measure x-ray emission on the Z facility. The PODD houses two plasma emission acquisition (PEA) systems, which are aligned with a set of precision machined pins. The PEA systems are modular, allowing a single diagnostic housing to support several different diagnostics. The PEA configurations fielded to date include both time-resolved and time-integrated, 1D spatially resolving, elliptical crystal spectrometers, and time-integrated, 1D spatially resolving, convex crystal spectrometers. Additional proposed configurations include time-resolved, monochromatic mirrored pinhole imagers and arrays of filtered x-ray diodes, diamond photo-conducting diode detectors, and bolometers. The versatility of the PODD system will allow the diagnostic configuration of the Z facility to be changed without significantly adding to the turn-around time of the machine. Additionally, the PODD has been designed to allow instrument setup to be completed entirely off-line, leaving only a refined alignment process to be performed just prior to a shot, which is a significant improvement over the instrument the PODD replaces. Example data collected with the PODD are presented. © 2012 American Institute of Physics.

Derzon, Mark S.; Galambos, Paul; Renzi, Ronald F.; Wiemann, Dora K.; Lake, Patrick W.; Wrobel, Diana L.; Robertson, Gideon R.; Claus, Liam D.; Martin, Staci R.

Abstract not provided.