Relativistic Heavy Ion Collider Rings Research Articles

Test Results for the Electron Lens Superconducting Magnets at RHIC

In order to partially compensate for head-on beam-beam effects from polarized proton collisions in the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory (BNL), two electron lenses (e-Lens) have been manufactured at BNL. For each e-Lens, one for each of the two RHIC rings, a low energy electron beam and the high energy proton beam will interact in a 2.5-m-long superconducting solenoid, which is also accompanied by four other smaller solenoids and 12 corrector dipoles, all of which are superconducting and provide various tuning and corrective functions during operations. The design of this multicoil assembly is a unique and complex one, and likewise, the simultaneous operation of the coils at 4.5 K is also challenging, due to high inductance and individual magnetic fields, which interact with each other. This paper reports on the results from extensive ramp and quench tests at 4.5 K, and the proper operating procedures determined from these tests.

The PP2PP experiment at RHIC: silicon detectors installed in Roman Pots for forward proton detection close to the beam

The PP2PP experiment is one of five experiments at the Relativistic Heavy Ion Collider (RHIC) at the Brookhaven National Laboratory, Long Island, New York. It is designed to measure the elastic scattering of protons at s = 50–500 GeV. The detector consists of silicon strip detectors mounted in Roman Pots and installed in the RHIC ring 60 m from the interaction region. During the engineering run of 2002 and physics run of 2003 the detectors were inserted as close as 15 mm from the proton beam. An overview of the experiment and details of the detector design and performance will be presented.

The PP2PP experiment at RHIC: silicon detectors installed in Roman Pots for forward proton detection close to the beam

The PP2PP experiment is one of five experiments at the Relativistic Heavy Ion Collider (RHIC) at the Brookhaven National Laboratory, Long Island, New York. It is designed to measure the elastic scattering of protons at s = 50–500 GeV. The detector consists of silicon strip detectors mounted in Roman Pots and installed in the RHIC ring 60 m from the interaction region. During the engineering run of 2002 and physics run of 2003 the detectors were inserted as close as 15 mm from the proton beam. An overview of the experiment and details of the detector design and performance will be presented.