Troubled Capstone Turbine Corp. in Chatsworth named Darren R. Jamison president and CEO. The maker of micro-energy systems has been without a chief executive since July, when John Tucker resigned from the company amid mounting losses. Microturbine lost $10.5 million in its fiscal year ended March 2006. That compares with a net loss of $7 million in fiscal 2005 and $16.8 million in fiscal 2004. Jamison was formerly president and chief operating officer of Northern Power Systems. Mark Gilbreth had been interim president and CEO during the transition. He will continue in the company as executive vice president and COO.