25-Word Abstract Imaging spectrometer designs capable of submicron distortion in both spectral and spatial directions are described, utilizing novel types of convex electron-beam-lithography-generated gratings.

We analyze the possibility of using a low-background Ge − NaI spectrometer in a reactor experiment for a search for neutrino magnetic moment down to 3×10−11 of the electron magneton. The properties of the so-far existing Ge low-background spectrometers are discussed and additional sources of background in a reactor experiment at a small depth are estimated. These estimates place specific requir...

We analyze the possibility of using a low-background Ge − NaJ spectrometer in a reactor experiment for a search for neutrino magnetic moment down to 3×10−11 of the electron magneton. The properties of the so-far existing Ge low-background spectrometers are discussed and additional sources of background in a reactor experiment at a small depth are estimated. These estimates place specific requir...

A goal of the Gun Test Facility (GTF) at SLAC is to investigate the production of highbrightness electron beams for the Linac Coherent Light Source (LCLS) X-ray FEL. High brightness in the rf photocathode gun occurs when the time-sliced emittance is nearly the same as the cathode thermal emittance and when the slices are all lined up, i.e., their Twiss parameters are nearly identical. In collab...

Electron momentum spectroscopy (EMS) gives direct information of the full energyresolved electron momentum densities of occupied states (bands) in solids – single crystal, polycrystalline or amorphous. Here we present data from a new high energy EMS spectrometer using 50 keV incident and 25 keV outgoing electrons, on polycrystalline specimens of aluminium, copper and gold. The spectral momentum...

Modern, high-brightness electron beams such as those from plasma wakefield accelerators and free-electron laser linacs continue the drive to ever-shorter bunch durations. In low-charge operation (~20 pC), bunches shorter than 10 fs are reported at the Linac Coherent Light Source (LCLS). Though suffering from a loss of phase information, spectral diagnostics remain appealing as compact, low-cost...