Accessing ASCR Facilities

ASCR Leadership Computing Challenge (ALCC)

ALCC Mission

The mission of the ASCR Leadership Computing Challenge (ALCC) is to provide an allocation program for projects of interest to the Department of Energy (DOE) with an emphasis on high-risk, high-payoff simulations in areas directly related to the DOE mission and for broadening the community of researchers capable of using leadership computing resources.

Call For Proposals

The call for 2017 ALCC Applications is closed. The 2018 Call for Proposals is expected to open in the Fall of this year.

Congratulations to our 2017 Awardees.

For 2017, ALCC is supporting 40 projects totaling over 4 billion processor hours. For a listing of 2017 awarded projects, see Current Awards.

Overview of ALCC

Open to scientists from the research community in industry, academia, and national laboratories, the ALCC program allocates up to 30% of the computational resources at ASCR’s supercomputing facilities. ASCR supercomputing facilities include NERSC at Lawrence Berkeley National Laboratory and the Leadership Computing Facilities at Argonne and Oak Ridge National Laboratories. These resources represent some of the world’s fastest and most powerful supercomputers.

ALCC is one of several allocation programs for ASCR supercomputing facilities (see ASCR Allocation Policy.pdf file (23KB)) and supports our efforts to further DOE mission science and to broaden community access to leadership computing facilities. To fulfill its goal of broadening community access, ALCC supports a wide range of project allocation sizes and allocates time across all three ASCR supercomputing facilities.

ALCC grants one year awards. In 2015, 43 ALCC awards were granted amounting to 2.9 billion processor hours with projects ranging in size from 5 to 175 million processor hours. Scientific discovery advanced by ALCC allocations range across the DOE mission space include (but not limited to) energy efficiency, computer science, climate modeling, materials science, bioenergy, and basic research. (See ALCC Past Awards and Awardees).

ALCC Resources

ALCC allocates high performance computing time on the primary HPC machines at each ASCR facility. For 2017-18 ALCC, these resources include Titan at Oak Ridge National Laboratory, Mira and Theta at Argonne National Laboratory, and Cori/Edison (Cray XC40/30 Intel Xeon nodes) and Cori (Cray XC40 Intel Xeon Phi KNL nodes) at Lawrence Berkeley National Laboratory. For a description of the computing resources at ASCR facilities, please see

See right side bar for more ALCC information links.

Last modified: 6/1/2017 2:20:06 PM