Emittance reconstruction from measured beam sizes in ATF2 and perspectives for ILC

Faus‐Golfe, A.; Fuster-Martínez, Nuria; Lopez, J. Resta; Navarro, Jorge

doi:10.1016/j.nima.2016.02.064

Cited by 5 publications

(3 citation statements)

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“…Sensitivity of fixed-optics 4D emittance measurements was observed by Woodley and Emma [13] and studied more recently by Agapov, Blair, and Woodley [14] as well as Faus-Golfe et al [15], all in the context of design studies for a future International Linear Collider (ILC). The motivation for these studies was to remove the cross-plane correlation in the beam to minimize the vertical emittance ε y .…”

Section: Implementation In the Snsmentioning

confidence: 88%

“…2 In general, the transfer matrix elements can be controlled by varying the machine optics (multi-optics method), the measurement location (fixed-optics method), or any combination of the two [11]. With four available wirescanners, the fixed-optics method is possible and preferred in our case due to its speed; however, previous studies have shown that the method can be sensitive to errors [12,13,14,15].…”

Section: Introductionmentioning

confidence: 99%

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Four-dimensional emittance measurement at the Spallation Neutron Source

Hoover¹,

Evans²

2022

Preprint

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A hadron beam with a uniform charge density, elliptical transverse profile, and small four-dimensional (4D) emittance could mitigate space charge effects in circular accelerators and improve collider performance. A phase space painting method to generate such a distribution is being tested in the Spallation Neutron Source (SNS) accumulator ring. A critical component of these efforts is to measure the 4D emittance of the beam. Reconstruction of the 4D emittance from wire-scanner data is a well-known technique. In this paper, we discuss the implementation of a variant of the multi-optics method using the four available wire-scanners near the SNS target, as well as the modification of the wire-scanner region to utilize the fixed-optics method -a method that is preferred due to its speed but can potentially lead to unacceptable bias and uncertainty in the reconstructed emittances. We then demonstrate the usefulness of the fixed-optics method by reconstructing the 4D emittance as a function of time during accumulation in the SNS ring.

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Section: Implementation In the Snsmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Four-dimensional emittance measurement at the Spallation Neutron Source

Hoover¹,

Evans²

2022

Preprint

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“…is called a four dimensional emittance or an intrinsic emittance [46][47][48]. Also, the relation between 2D emittances and 4D emittances is…”

Section: Four Dimensional Beam Emittancementioning

confidence: 99%

Study of tunable narrow-band THz and high-intensity channeling radiation sources with a 50 MeV class photo-injector

Hyun

Sen

2018

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, declare that this thesis titled, 'Generating tunable narrow-band THz radiation and high intensity channeling radiation with a 50 MeV class photo-injector' and the work presented in it are my own. I confirm that: ⌅ This work was done wholly or mainly while in candidature for a research degree at this University. ⌅ Where any part of this thesis has previously been submitted for a degree or any other qualification at this University or any other institution, this has been clearly stated. ⌅ Where I have consulted the published work of others, this is always clearly attributed. ⌅ Where I have quoted from the work of others, the source is always given. With the exception of such quotations, this thesis is entirely my own work. ⌅ I have acknowledged all main sources of help. ⌅ Where the thesis is based on work done by myself jointly with others, I have made clear exactly what was done by others and what I have contributed myself.

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