A method for producing clean energy from coal by feeding the coal in a reactor which is sealed to the atmosphere and moving the coal in the reactor while injecting oxygen to combust a portion of the coal in a substoichiometric mode to devolatilize the coal and yield a pressurized hydrogen rich raw gas which contains coal-derived cancer causing distillates and hydrocarbons together with a hot char. A row of electron beams is arranged in the longitudinal direction of the track. This can be avoided by providing a composite dielectric region having electrically isolated inclusions of a thermal expansion coefficient less than that of the dielectric material in which they are embedded andor closer to the substrate TEC. The supporting arm includes an attachment section configured to attach to the housing and a clamp strap configured to hold cables. The laser diode is sealed within the pump module housing with a lid and the window, which is bonded to the lid.