High Intensity Beams For Nuclear Astrophysics At LENA II

The Laboratory for Experimental Nuclear Astrophysics (LENA) located at Triangle Universities Nuclear Laboratory (TUNL) is a world leading facility for the direct measurement of cross sections relevant to stellar burning and nucleosynthesis. For over a decade, LENA has been using low energy, high intensity (> 1 mA) proton beams to study radiative capture reactions on stable isotopes. With the recent installation of a new 2 MV Singletron accelerator manufactured by High Voltage Europa and upgrade of the low energy ECR accelerator, LENA has become LENA II. The Singletron is a unique accelerator capable of delivering hydrogen and helium either as DC beams of mA intensity or pulsed beams with 2 ns pulse widths. Similarly unique is the upgraded ECR, which will reestablish itself as the highest intensity accelerator of its type in the world, delivering beams of up to 20 mA to target. In this talk I will discuss the commissioning work on the accelerators, the new digital data acquisition system, and preliminary experimental work.