Peter Docker
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View article: The application of acoustics for sample manipulation and delivery at X-Ray Light Sources
The application of acoustics for sample manipulation and delivery at X-Ray Light Sources Open
The latest developments in acoustic technology and their integration of standing waves offers the potential to eject and trap tiny amounts of both liquid and solids with precision and stability in free space. This is appealing for experime…
View article: Temperature-dependent topography of novel cryocooled shrink-fit cylindrical crystal
Temperature-dependent topography of novel cryocooled shrink-fit cylindrical crystal Open
As the Diamond Light Source progresses towards becoming a fourth-generation synchrotron with the Diamond-II upgrade, there is a requirement for the development of novel approaches to the cooling of optics to enable them to cope with the as…
View article: Novel passive resonant structures for precision assembly of synchrotron X-ray optics
Novel passive resonant structures for precision assembly of synchrotron X-ray optics Open
Many optics at synchrotron and free electron laser facilities need to be cooled to dissipate the heat imparted by the intense photon beams. For indirectly cooled optics, distortion of the surface can occur when excessive or asymmetrical cl…
View article: Passive doubly curved structures for determining clamping forces applied to X-ray optic assemblies
Passive doubly curved structures for determining clamping forces applied to X-ray optic assemblies Open
Clamping of indirectly cryogenically cooled X-ray optics is required to ensure effective heat transfer between the optic and heat exchanger. However, clamping forces can result in distortion of the optical surface of monochromators and mir…
View article: Tractor beam acoustic levitation for time resolved crystallography experiments
Tractor beam acoustic levitation for time resolved crystallography experiments Open
Proof of concept of serial crystallography is carried out through the translation of samples delivered by tractor beam levitation. This is achieved using arrays of low powered transducers, focused to produce acoustic traps. Contrary to tra…
View article: In-built resonant structures for precision assembly of X-Ray Optics for 4th Generation Light Sources
In-built resonant structures for precision assembly of X-Ray Optics for 4th Generation Light Sources Open
As the Diamond Light Source embraces the move towards becoming a fourth generation light source it will require its optics to perform under increasingly demanding conditions. Foremost amongst these conditions will be the increasing powers …
View article: On the utility of fluid flow models in the design of heat exchangers for cooling 4th generation X ray optics
On the utility of fluid flow models in the design of heat exchangers for cooling 4th generation X ray optics Open
As the Diamond Light source moves towards upgrading to a 4th generation source, increasing x-ray powers and reduced focal sizes will require improved cryogenic cooling to ensure that the projected new levels of brilliance are achieved. Thi…
View article: Reducing sample consumption for serial crystallography using acoustic drop ejection
Reducing sample consumption for serial crystallography using acoustic drop ejection Open
Efficient sample delivery is an essential aspect of serial crystallography at both synchrotrons and X-ray free-electron lasers. Rastering fixed target chips through the X-ray beam is an efficient method for serial delivery from the perspec…
View article: The application of interference fits for overcoming limitations in clamping methodologies for cryo-cooling first crystal configurations in x-ray monochromators
The application of interference fits for overcoming limitations in clamping methodologies for cryo-cooling first crystal configurations in x-ray monochromators Open
The work detailed here describes how a novel approach has been applied to overcome the challenging task of cryo-cooling the first monochromator crystals of many of the world's synchrotrons' more challenging beam lines. The beam line config…
View article: A Thermal Exploration of Different Monochromator Crystal Designs
A Thermal Exploration of Different Monochromator Crystal Designs Open
Eight potential monochromator crystal designs were subjected to a combination of three different beam powers on two different footprints. The temperature and thermal deformation were determined for each. It was found that thermal deformati…
View article: An acoustic on-chip goniometer for room temperature macromolecular crystallography
An acoustic on-chip goniometer for room temperature macromolecular crystallography Open
Development and successful operation of an on-chip goniometer for macromolecular protein crystallography.
View article: Pico-litre sample introduction and acoustic levitation systems for time resolved protein crystallography experiments at XFELS
Pico-litre sample introduction and acoustic levitation systems for time resolved protein crystallography experiments at XFELS Open
The system described in this work is a variant from traditional acoustic levitation first described by, Marzo et al [1]. It uses multiple transducers eliminating the requirement for a mirror surface, allowing for an open geometry as the so…
View article: Analytical model for heat absorption: Lessons learned from a one dimensional model
Analytical model for heat absorption: Lessons learned from a one dimensional model Open
An analytical model was constructed of a single silicon crystal monochromator. This model was used to examine the heat transfer processes within the monochromator. It was discovered that extracting heat from the top surface of the monochro…