(a)
In general— The Secretary of Energy shall provide for the upgrade to the Linac Coherent Light Source II facility described in the publication approved by the Basic Energy Sciences Advisory Committee on June 9, 2016, titled “Report on Facility Upgrades”, including the development of experimental capabilities for high energy x-rays to reveal fundamental scientific discoveries. The Secretary shall ensure the upgrade under this section enables the production and use of high energy, ultra-short pulse x-rays delivered at a high repetition rate.
(b)
Definitions— In this section:
(1)
High energy x-ray— The term a “high energy x-ray” means a photon with an energy at or exceeding 12 kiloelectron volts.
(2)
High repetition rate— The term “high repetition rate” means the delivery of x-ray pulses up to one million pulses per second.
(3)
Ultra-short pulse x-rays— The term “ultra-short pulse x-rays” means x-ray bursts capable of durations of less than 100 femtoseconds.
(c)
Start of operations— The Secretary shall, to the maximum extent practicable, ensure that the start of full operations of the upgrade under this section occurs before December 31, 2025.
(d)
Funding— There are authorized to be appropriated to the Secretary for the Office of Science to carry out to completion the upgrade under this section—
(1)
$20,000,000 for fiscal year 2018;
(2)
$55,000,000 for fiscal year 2019;
(3)
$80,000,000 for fiscal year 2020;
(4)
$80,000,000 for fiscal year 2021;
(5)
$54,000,000 for fiscal year 2022; and
(6)
$31,000,000 for fiscal year 2023.