We use scanning tunneling microscopy (STM) and spectroscopy (STS), and x-ray
photoelectron spectroscopy (XPS) to investigate the effect of nitrogen doping on the surface …

In recent years, renewed interest has been given to alternatives to bulk Nb for use in
superconducting radio frequency (SRF) cavities. Much of this research has involved the use …

Elemental type-II superconducting niobium is the material of choice for superconducting
radiofrequency cavities used in modern particle accelerators, light sources, detectors …

Molecular dynamics (MD) simulations are performed to study the growth mechanisms of Nb
thin film on Cu substrate. In this investigation, we provide insights and information about the …

A recently discovered modified low-temperature baking leads to reduced surface losses and
an increase of the accelerating gradient of superconducting TESLA shape cavities. We will …

A fundamental understanding of superconducting radio frequency Nb cavity processing is
necessary to achieve the desired improvement in their performance, which is needed for …

A first series of nitrogen infusion runs of 1.3 GHz single-cell cavities at DESY resulted in an
unexpected and severe deterioration observed during the vertical cold test. To investigate …

In superconducting radiofrequency accelerating cavities for particle accelerators, the Nb/Cu
structure is one of the alternatives to bulk Nb but R&D is required to achieve a reproducible …

The effect of annealing on the superconducting properties of niobium single crystals was
studied using optical, magnetic, and scanning tunneling microscopy (STM) methods. Pieces …

A series of experiments were carried out in an effort to develop a simple method for
predicting the magnetic flux expulsion behavior of high purity niobium used to fabricate …