This seminar was established based on a general interest in learning more about CHESS, how a synchrotron works, and basic information about many x-ray methods. Members intend to both expand upon personal knowledge of x-ray methods and incorporate new techniques into their respective research projects.
Scientists and engineers use the beams to study the properties of materials as they are subjected to rapid changes in environmental conditions.
The fabrication of magnets, vacuum systems, power conversion components, instrumentation, and other systems has been ramping up over the last 6 months. The first few components of each type were fabricated in house, but most are contracted to upstate NY businesses. The following is an illustrated series of snapshots of activities.
But what if large crystals are not available? A team of scientists at MacCHESS and the University of Toronto is pushing what is possible for small protein crystals at storage ring sources.
Over the past decade, such strange entities as magnetic monopoles, Majorana fermions, and even Higgs modes have been predicted and identified inside materials at low temperatures. The goal of learning to manipulate these new quanta for technological purposes is a grand challenge for science, predicted to spark a "second quantum revolution". Among the intriguing zoo of new particles which exploit the topological properties of electronic wavefunctions, the Weyl fermions (which are charged, massless, and chiral) were originally postulated in the 1920s but have never bee
Abstract: A proof-of-principle demonstration of the Optical Stochastic Cooling (OSC) with 100 MeV electrons in the Integrable Optics Test Accelerator (IOTA) is being pursued at Fermilab. In OSC radiation generated in a pickup undulator is imaged in a downstream kicker undulator. A magnetic chicane between undulators determines a phase between particle motion and light in the kicker providing a corrective longitudinal kick.
Louisa Smieska and Ruth Mullet were surprised to find barium in the azurite blues of medieval illuminated manuscript pages. Azurite, a soft, deep blue copper mineral produced by weathering of copper ore deposits, has been recognized since ancient time. However, the trace element barium is more often associated with modern paints, and, according to the researchers, has never been reported in illuminated manuscripts before.
CBETA tests two energy-saving technologies for accelerators: energy recovery and permanent magnets. An energy recovery linac (ERL) like CBETA reclaims the energy of a used electron beam instead of dumping it after the experiment. The recovered energy is used to accelerate the next beam of particles, creating a beam of electrons that can be used for many areas of research. The beams are accelerated by Superconducting Radio Frequency (SRF) units, another energy-efficient technology pioneered at Cornell.
This is a time when we focus on maintenance of the synchrotron and CESR, upgrading systems and equipment, and preparing for CHESS-U. Brief summaries of just a few of the Summer Down projects are below:
This summer, we are upgrading the safety system at G-line. The upgrade will include PLC (touch screen) displays at all of the G-line hutches and magnetic door locks on the hutches in place of keys. Over 800 wiring connections have been made so far as part of this upgrade, and several hundred feet of old cables have been removed from wire trays.