The magnet system of the VENUS ECR Ion Source at LBNL has two 1.5-watt cryocoolers suspended in the cryostat vacuum. Helium vapor from the liquid reservoir is admitted to a finned condenser bolted to the cryocooler 2 stage and returns as liquid via gravity. Small-diameter flexible tubes allow the cryocoolers to be located remotely from the reservoir. With 3.1 watts load, the helium reservoir is...

Development of superconducting undulators continues at the Advanced Photon Source (APS). The second superconducting undulator, SCU1, has been built and prepared for installation in the storage ring at the APS. This undulator has a 1.1-m long superconducting magnet and utilizes an improved version of the cryostat of the first superconducting undulator, SCU0. The results of the cold test of the S...

We present the design and testing of a rotating device that fits within a commercial helium cryostat and is capable of providing at 4 K a fresh sample surface for subsequent shots of a 1-10 kHz amplified pulsed laser. We benchmark this rotator in a transient-absorption experiment on molecular switches. After showing that the device introduces only a small amount of additional noise, we demonstr...

Irradiated rats were reconstituted with bone marrow from F1 hybrids. Ia antigen of donor-bone marrow origin was detected by an immunoperoxidase technique on cryostat sections and found predominantly in the medulla of rat thymus 2 wk after reconstitution. These Ia-bearing cells increased in number with time after reconstitution, but the Ia on the cortical epithelial cells remained of host origin...

Latest results of testing the compact dual bore quadrupole and sextupole represented. Dual bore quadrupole tested in cryostat up to ~150 A feeding current generating ~1 kG/cm in each aperture. Sextupole was tested in Dewar and able to generate ~0.7 kG/cm of integrated field. Transverse size of the magnets cold masses is about 180 mm. Dual bore water cooled room temperature apertures are 54 mm i...

The EXOGAM clover detector consists of four high-purity germanium (HPGe) crystals in a common cryostat. Each individual crystal is electrically segmented into four regions. We propose a method based on a multidimensional fitting procedure to calibrate the energy from the segments. This method could be used for any kind of segmented germanium detector. Its application to the EXOGAM clover is dis...

Noble liquid calorimeters have been successfully used in particle physics experiments for decades. The project presented this article is that of a new noble calorimeter concept, where novel design allows us to fulfil the stringent requirements on calorimetry programme electron-positron Future Circular Collider at CERN. High granularity achieved through specific readout electrodes and high-densi...