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Title: Target Area design basis and system performance for the National Ignition Facility

Abstract

A description of Target Area systems performance shows that the target area conceptual design can meet its performance criteria. Before the shot, the target area provides a vacuum of < 5 {times} 10{sup {minus}5} Torr within 2 hours. A target, cryogenic or non-cryogenic, is placed to within 1 cm of chamber center with a positioner that minimizes vibration of the target. The target is then aligned to {le} 7 {mu}m by using the Target Alignment Sensor (TAS) system. The viewers in this system will also determine if the target is ready for illumination. Diagnostics are aligned to the necessary specifications by the alignment viewers. The target is shot and data is collected. Nearly all tritium (if present) is passed through the vacuum system and into the collection system. The analysis that supports the target area design basis is a combination of careful assumptions, data, and calculations. Some uncertainty exists concerning certain aspects of the source terms for x-rays and debris, material responses to this energy flux, and the full consequences of the material responses that do occur. For this reason, we have selected what we believe are conservative values in these areas. Advanced conceptual design activities will improve our understandingmore » of these phenomena and allow a more quantitative assessment of the degree of conservatism inherent to the system. However, the results of this preliminary survey of target area operations indicate an annual shot rate of > 600 (for the mix of shots shown in Table 1) is feasible for this set of target area systems.« less

Authors:
; ; ; ; ;  [1]; ; ;  [2]
  1. Lawrence Livermore National Lab., CA (United States)
  2. Sandia National Labs., Albuquerque, NM (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10173645
Report Number(s):
UCRL-JC-115583; CONF-940630-32
ON: DE94016697; TRN: 94:016658
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 11. topical meeting on the technology of fusion energy,New Orleans, LA (United States),19-24 Jun 1994; Other Information: PBD: Jun 1994
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; LASER FUSION REACTORS; TARGET CHAMBERS; DESIGN; INERTIAL CONFINEMENT; ICF DEVICES; TRITIUM; SURFACE CLEANING; 700411; INERTIAL CONFINEMENT DEVICES

Citation Formats

Tobin, M, Karpenko, V, Hagans, K, Anderson, A, Latkowski, J, Warren, R, Wavrik, R, Garcia, R, and Boyes, J. Target Area design basis and system performance for the National Ignition Facility. United States: N. p., 1994. Web.
Tobin, M, Karpenko, V, Hagans, K, Anderson, A, Latkowski, J, Warren, R, Wavrik, R, Garcia, R, & Boyes, J. Target Area design basis and system performance for the National Ignition Facility. United States.
Tobin, M, Karpenko, V, Hagans, K, Anderson, A, Latkowski, J, Warren, R, Wavrik, R, Garcia, R, and Boyes, J. 1994. "Target Area design basis and system performance for the National Ignition Facility". United States. https://www.osti.gov/servlets/purl/10173645.
@article{osti_10173645,
title = {Target Area design basis and system performance for the National Ignition Facility},
author = {Tobin, M and Karpenko, V and Hagans, K and Anderson, A and Latkowski, J and Warren, R and Wavrik, R and Garcia, R and Boyes, J},
abstractNote = {A description of Target Area systems performance shows that the target area conceptual design can meet its performance criteria. Before the shot, the target area provides a vacuum of < 5 {times} 10{sup {minus}5} Torr within 2 hours. A target, cryogenic or non-cryogenic, is placed to within 1 cm of chamber center with a positioner that minimizes vibration of the target. The target is then aligned to {le} 7 {mu}m by using the Target Alignment Sensor (TAS) system. The viewers in this system will also determine if the target is ready for illumination. Diagnostics are aligned to the necessary specifications by the alignment viewers. The target is shot and data is collected. Nearly all tritium (if present) is passed through the vacuum system and into the collection system. The analysis that supports the target area design basis is a combination of careful assumptions, data, and calculations. Some uncertainty exists concerning certain aspects of the source terms for x-rays and debris, material responses to this energy flux, and the full consequences of the material responses that do occur. For this reason, we have selected what we believe are conservative values in these areas. Advanced conceptual design activities will improve our understanding of these phenomena and allow a more quantitative assessment of the degree of conservatism inherent to the system. However, the results of this preliminary survey of target area operations indicate an annual shot rate of > 600 (for the mix of shots shown in Table 1) is feasible for this set of target area systems.},
doi = {},
url = {https://www.osti.gov/biblio/10173645}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jun 01 00:00:00 EDT 1994},
month = {Wed Jun 01 00:00:00 EDT 1994}
}

Conference:
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