It looks like Energy Secretary Chu has decided on how to spend $1.2 billion of the $1.6 billion Congress set aside for Department of Energy’s Office of Science:

Declaring leadership in science “vital to America’s prosperity, energy security and global competitiveness,” Energy Secretary Steven Chu announced Monday that $1.2 billion in federal stimulus money will be distributed to national laboratories.
Chu, a Nobel Prize-winning physicist, made the announcement after touring the Brookhaven National Laboratory on eastern Long Island. The lab will be receiving $184 million in stimulus money, including $150 million to build a light source that aims to create the brightest X-ray source in the world.
The project, called National Synchrotron Light Source II, would produce X-rays about 10,000 times brighter than an existing version at the lab, used by about 2,100 researchers a year. Scientists hope the new version would yield breakthroughs in disciplines including biology, medicine, chemistry, environmental sciences and physics.
The $1.2 billion is being distributed among nine labs across the country, including Brookhaven.
“These projects not only provide critically needed short-term economic relief but also represent a strategic investment in our nation’s future,” said Chu, who joined the Obama Cabinet after serving as director of the Lawrence Berkeley National Laboratory since 2004. . . .
Congress approved $1.6 billion in stimulus funding for the Department of Energy. Officials said they are working on details to distribute the remaining $371 million.

It should be clarified that the $1.6 billion is allocated to the DOE’s Office of Science and is a small part of what the DOE has to allocate toward other projects. Here’s a detailed breakdown from the DOE’s website of this chunk.