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View article: Status of the ALS-U project to create a soft x-ray diffraction limited light source
Status of the ALS-U project to create a soft x-ray diffraction limited light source Open
The ALS-U project to upgrade the Advanced Light Source to a multi bend achromat lattice received CD-3 approval in 2022 marking the start of the construction phase for the Storage Ring. Construction of the accumulator under a prior CD-3A au…
View article: Lattice correction and commissioning simulation of the Advanced Light Source upgrade storage ring
Lattice correction and commissioning simulation of the Advanced Light Source upgrade storage ring Open
The ALS-U is the upgrade of the existing Lawrence Berkeley National Laboratory Advanced Light Source to a diffraction-limited soft x-ray light source. Here we present the lattice correction studies and commissioning simulations demonstrati…
View article: Three-dipole kicker injection scheme for the Advanced Light Source upgrade accumulator ring
Three-dipole kicker injection scheme for the Advanced Light Source upgrade accumulator ring Open
The Advanced Light Source Upgrade will implement on axis single-train swap-out injection employing an accumulator between the booster and storage rings. The accumulator ring (AR) design is a twelve period triple-bend achromat that will be …
View article: The Three-Dipole Kicker Injection Scheme for the ALS-U Accumulator Ring
The Three-Dipole Kicker Injection Scheme for the ALS-U Accumulator Ring Open
The ALS-U light source will implement on-axis single-train swap-out injection employing an accumulator between the booster and storage rings. The accumulator ring design is a twelve period triple-bend achromat that will be installed along …
View article: ATS/STA Transfer Line Design for the ALS Upgrade Project (ALS-U)
ATS/STA Transfer Line Design for the ALS Upgrade Project (ALS-U) Open
At the Advanced Light Source Upgrade (ALS-U), an on-axis swap-out injection will be used to replenish depleted bunches in the storage ring with refreshed bunches from the full energy accumulator ring. To implement this scheme, two transfer…
View article: The Three Dipole Kicker Injection Scheme for the ALS-U Accumulator Ring
The Three Dipole Kicker Injection Scheme for the ALS-U Accumulator Ring Open
The ALS-U light source will implement on-axis swap-out injection of individual trains employing an accumulator between the booster and storage rings. The accumulator ring design is a twelve period triple-bend achromat that will be installe…
View article: Injection and Extraction Kickers for the Advanced Light Source Upgrade Project (ALS-U)
Injection and Extraction Kickers for the Advanced Light Source Upgrade Project (ALS-U) Open
The Advanced Light Source upgrade project (ALS-U) at Lawrence Berkeley National Laboratory includes the construction of a new accumulator ring and the replacement of the existing storage ring. Both ferrite-loaded kickers and stripline kick…
View article: The Broad-Band Impedance Budget in the Storage Ring of the ALS-U Project
The Broad-Band Impedance Budget in the Storage Ring of the ALS-U Project Open
Design work is underway for the upgrade of the Advanced Light Source (ALS-U) to a diffraction-limited soft x-rays radiation source. Like other 4th-generation light source machines, the ALS-U multiple-bend achromat storage-ring (SR) is pote…
View article: The Impact of Short-Range Wakes on Injection Into the ALS-U Accumulator Ring
The Impact of Short-Range Wakes on Injection Into the ALS-U Accumulator Ring Open
As part of the ALS-U design, bunches with small charge will be added to the accumulator ring in a manner that initially leaves both the stored and injected bunches displaced from the nominal orbit. While the beam current is below instabili…
View article: Multi-Bunch Resistive Wall Wake Field Tracking via Pseudomodes in the ALS-U Accumulator Ring
Multi-Bunch Resistive Wall Wake Field Tracking via Pseudomodes in the ALS-U Accumulator Ring Open
For the ALS-U project, particles will be injected from the booster to the accumulator ring utilizing an injection scheme that leaves the stored and injected particles with a non-trivial transient. This transient requires that multibunch fe…
View article: Single Bunch Instability Simulations in the Storage Ring of the ALS-U Project
Single Bunch Instability Simulations in the Storage Ring of the ALS-U Project Open
As the broad-band impedance modeling and the vacuum chamber design of the new Advanced Light Source storage ring (ALS- U) reach maturity, we report on progress in single-bunch collective effects studies. A pseudo-Green function wake repres…
View article: Development of a Decoherence Kicker for the ALS Upgrade Project (ALS-U)
Development of a Decoherence Kicker for the ALS Upgrade Project (ALS-U) Open
The Advanced Light Source (ALS) at Lawrence Berkeley National Laboratory is upgrading the existing storage-ring lattice to a nine-bend-achromat lattice with on-axis swap-out injection. The upgraded storage ring will provide a highly focuse…
View article: Optimizations of nonlinear kicker injection for synchrotron light sources
Optimizations of nonlinear kicker injection for synchrotron light sources Open
The concept of using a single nonlinear kicker (NLK) to inject electron beams into a storage ring has been proposed and tested in several synchrotron radiation light source facilities. Different from pulsed dipole kicker magnets used in a …
View article: Toolkit for simulated commissioning of storage-ring light sources and application to the advanced light source upgrade accumulator
Toolkit for simulated commissioning of storage-ring light sources and application to the advanced light source upgrade accumulator Open
We present a new accelerator toolbox (AT)-based toolkit for simulating the commissioning of light-source storage rings. The toolkit provides a framework for supporting high-level scripts to represent with realism the various procedures (e.…
View article: A New Light for Berkeley Lab—the Advanced Light Source Upgrade
A New Light for Berkeley Lab—the Advanced Light Source Upgrade Open
The Advanced Light Source Upgrade Project (ALS-U) will leverage multibend achromat technology to endow the ALS with revolutionary soft X-ray capabilities, and has recently received formal approval to proceed to the preliminary design phase…
View article: Commissioning Simulation Study for the Accumulator Ring of the Advanced Light Source Upgrade
Commissioning Simulation Study for the Accumulator Ring of the Advanced Light Source Upgrade Open
The Advanced Light Source Upgrade (ALS-U) to a diffraction-limited soft x-rays light source requires the construction of an Accumulator Ring (AR) to enable swap-out, on-axis injection. The AR lattice is a Triple-Bend-Achromat lattice simil…
View article: Removal and Installation Planning for the Advanced Light Source - Upgrade Project
Removal and Installation Planning for the Advanced Light Source - Upgrade Project Open
The ALS-U project is a proposed upgrade to the Advanced Light Source (ALS) at Berkeley Lab that aims to deliver diffraction limited performance in the soft x-ray range. By lowering the horizontal emittance to about 70 pm rad, the brightnes…
View article: Design of Booster-to-Accumulator Transfer Line for Advanced Light Source Upgrade
Design of Booster-to-Accumulator Transfer Line for Advanced Light Source Upgrade Open
For the Advanced Light Source Upgrade, an on-axis swap-out injection is applied to exchange bunch trains between the storage ring and the accumulator ring. To replenish the accumulator ring before the swap-out injection, an electron beam f…
View article: Design Progress of ALS-U, the Soft X-ray Diffraction Limited Upgrade of the Advanced Light Source
Design Progress of ALS-U, the Soft X-ray Diffraction Limited Upgrade of the Advanced Light Source Open
The ALS-U project to upgrade the Advanced Light Source to a multi bend achromat lattice received CD-1 approval in 2018 marking the end of its conceptual design phase. The ALS-U design promises to deliver diffraction limited performance in …
View article: Feasibility Study of Beam Profile Measurements Using Interferometer and Diffractometer Techniques for ALS-U
Feasibility Study of Beam Profile Measurements Using Interferometer and Diffractometer Techniques for ALS-U Open
ALS-U is an ongoing upgrade of Advanced Light Source (ALS) at Lawrence Berkeley National Laboratory. The upgraded ALS will replace the existing Triple-Bend Achromat (TBA) storage ring lattice with a compact Multi-Bend Achromat (MBA) lattic…
View article: Simulation of trajectory correction in early commissioning of the Advanced Light Source upgrade
Simulation of trajectory correction in early commissioning of the Advanced Light Source upgrade Open
The ALS upgrade into a diffraction-limited soft x-rays light source requires a small emittance, which is achieved by much stronger focusing than in the present ALS. Very strong focusing elements and a relatively small vacuum chamber make t…
View article: Beam-Loading Transients and Bunch Shape in the Operation of Passive Harmonic Cavities in the ALS-U
Beam-Loading Transients and Bunch Shape in the Operation of Passive Harmonic Cavities in the ALS-U Open
The ALS-U is a major upgrade of the LBNL ALS to a diffraction limited light source. The current plan is to replace all the vacuum and magnet components while retaining the existing 500 MHz main and third-harmonic, passively operated, rf ca…
View article: Compensation of Insertion Device Induced Emittance Variations in Ultralow Emittance Storage Rings
Compensation of Insertion Device Induced Emittance Variations in Ultralow Emittance Storage Rings Open
With the advent of multi-bend achromat lattices, extremely low emittances are to become the norm in storage ring-based X-ray photon sources. In these lattices, the ratio of beam energy lost to radiation in the Insertion Devices (IDs) to th…
View article: Design of Asymmetric Quadrupole Gradient Bending R&D Magnet for the Advanced Light Source Upgrade (ALS-U)
Design of Asymmetric Quadrupole Gradient Bending R&D Magnet for the Advanced Light Source Upgrade (ALS-U) Open
Lawrence Bekerley National Laboratory (LBNL) is en-gaged in the development of magnets for the upgrade of the ALS synchrotron (ALS-U) [1]. The proposed ALS-U lattice is a 9-bend achromat reproducing the existing 12-fold symmetric ALS foot …
View article: ALS-U: A Soft X-Ray Diffraction Limited Light Source
ALS-U: A Soft X-Ray Diffraction Limited Light Source Open
Improvements in brightness and coherent flux of about two orders of magnitude over operational storage ring based light sources are possible using multi bend achromat lattice designs. These improvements can be implemented as upgrades of ex…
View article: Impedance and Collective Effects for the Advanced Light Source Upgrade at LBNL
Impedance and Collective Effects for the Advanced Light Source Upgrade at LBNL Open
The upgrade of the Advanced Light Source (ALS-U) consists of a multiband achromat ultralow emittance lattice for the production of diffraction-limited soft x-rays. A very important issue for ALS-U is represented by instabilities induced by…
View article: On-Axis Swap-Out Injection R+D for ALS-U
On-Axis Swap-Out Injection R+D for ALS-U Open
The ALS-U upgrade promises to deliver diffraction limited performance throughout the soft x-ray range by lowering the horizontal emittance by a factor of 40 compared to the current ALS. One of the consequences of producing a small emittanc…
View article: Design of the ALS-U Storage Ring Lattice
Design of the ALS-U Storage Ring Lattice Open
The Advanced Light Source (ALS) at Lawrence Berkeley National Laboratory is proposing the upgrade of its synchrotron light source to reach soft x-ray diffraction limits within the present ALS footprint. The storage ring lattice design and …
View article: Status of the Conceptual Design of ALS-U
Status of the Conceptual Design of ALS-U Open
The ALS-U upgrade promises to deliver diffraction limited performance throughout the soft x-ray range by lowering the horizontal emittance to about 50~pm resulting in 2-3 orders of brightness increase for soft x-rays compared to the curren…