Lawson criterion for ignition exceeded in an inertial fusion experiment

For more than half a century, researchers around the world have been engaged in attempts to achieve fusion ignition as a proof of principle of various fusion concepts. Following the Lawson criterion, an ignited plasma is one where the fusion heating power is high enough to overcome all the physical processes that cool the fusion plasma, creating a positive thermodynamic feedback loop with rapidly increasing temperature. In inertially confined fusion, ignition is a state where the fusion plasma can begin "burn propagation" into surrounding cold fuel, enabling the possibility of high energy gain. While "scientific breakeven" (i.e., unity target gain) has not yet been achieved (here target gain is 0.72, 1.37 MJ of fusion for 1.92 MJ of laser energy), this Letter reports the first controlled fusion experiment, using laser indirect drive, on the National Ignition Facility to produce capsule gain (here 5.8) and reach ignition by nine different formulations of the Lawson criterion

Historical research in marketing theory and practice: a review essay

This paper reviews 30 years of interdisciplinary scholarship that deals with marketing history or the history of marketing thought. We have ranged across the humanities and social sciences to review the very best scholarship that these domains have produced which speaks to issues likely to concern the readers of the Journal of Marketing Management (JMM). These domains include: the history of marketing management, history of market research, history of market segmentation, product management history, retailing and channels history, promotion history, advertising history, the history of marketing thought, and marketing and the management of subjectivity, among others. Given obvious page limitations we have nevertheless tried to appeal to the paradigmatic span of the readers of the JMM. With this in mind, we have critically reviewed material that will be of interest to managerially oriented academics, as well as those who subscribe to consumer culture theoretics and critical marketing studies