Operation of the DC Current Transformer intensity monitors at FNAL during Run II

Crisp, J.; Fellenz, B.; Heikkinen, D.; Ibrahim, Mohammed; Meyer, Tyler; Vogel, G.

doi:10.1088/1748-0221/7/01/t01002

Cited by 4 publications

(6 citation statements)

References 5 publications

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“…The beam losses observed in this study are inferred by decreases in beam intensity measured by Direct Current Beam Current Transformers (DCCTs) [81]. The Fermilab ACNET control system [82] was used to log the beam intensity thorough-out the study.…”

Section: Loss Study Resultsmentioning

confidence: 99%

“…These DCCTs respond linearly with beam intensity but are not calibrated to each other. The DCCTs also have a known dependence on beam quality parameters such as bunch length [81] that may not be the same for all DC-CTs. Variation in beam quality prevented us from relating beam intensity in the Recycler to beam intensity in the Main Injector, therefore losses during extraction from the Recycler could not be measured.…”

Section: Loss Study Resultsmentioning

confidence: 99%

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Slip-stacking Dynamics for High-Power Proton Beams at Fermilab

Eldred¹

2015

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Section: Loss Study Resultsmentioning

confidence: 99%

Section: Loss Study Resultsmentioning

confidence: 99%

Slip-stacking Dynamics for High-Power Proton Beams at Fermilab

Eldred¹

2015

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“…The applications of DCCTs include monitoring of power grid [3], intensity measurements of particle beam in high-energy physics accelerators [4], control systems for power supply [5], and so on. These applications operate at room temperature.…”

Section: Jinst 9 P03011mentioning

confidence: 99%

A cryogenic sensing element for measurement current transformers

et al. 2014

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The design of a cryogenic sensing element for superconducting DC current transformers working up to 100 kA at 4.2 K is proposed. Limitations of µ-metal magnetic characteristics at cryogenic conditions are overcome by a soft Ni 81-Mo 5-Fe magnetic alloy (referred to as cryogenic permalloy). An optimized geometrical design allows cores saturation due to mechanical constraints to be avoided. The effectiveness of the design is demonstrated through electromagnetic simulations exploiting measurement results from the characterization of cryogenic permalloy samples. Moreover, a preliminary lab-scale cryogenic DCCT prototype for a nominal current of 20 kA is implemented and characterized. A typical precision of the transducer below ±0.05% is achieved along with nonlinearity better than ±0.05%.

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“…The overall system bandwidth was 2MHz. [3] In the Recycler there is a commercial DCCT, designed from Bergoz Instrumentation. The Bergoz Parametric Current Transformer, PTC-113-0100-MA is a complete system, including sensor, electronics and cables.…”

Section: Beam Lossesmentioning

confidence: 99%

Digital Signal Processing and Generation for a DC Current Transformer for Particle Accelerators

Zorzetti

2013

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The thesis topic, digital signal processing and generation for a DC current transformer, focuses on the most fundamental beam diagnostics in the field of particle accelerators, the measurement of the beam intensity, or beam current. The technology of a DC current transformer (DCCT) is well known, and used in many areas, including particle accelerator beam instrumentation, as non-invasive (shunt-free) method to monitor the DC current in a conducting wire, or in our case, the current of charged particles travelling inside an evacuated metal pipe. So far, custom and commercial DCCTs are entirely based on analog technologies and signal processing, which makes them inflexible, sensitive to component aging, and difficult to maintain and calibrate.The DCCT presented in this thesis is a new approach to minimize the use of analog technologies, and based the signal processing and generation of a DCCT system on digital technologies. This also was motivated by the fact, that the Fermilab in-house developed DCCT from 25 years ago (Bob Webber) now lacks in the availability of replacement electronics parts. This DCCT is quite different from our previous analog-based system; it also differs from commercial DCCTs, e.g. made by Bergoz, as it adds an AC current transformer into the system to enhance the overall bandwidth. It soon will become the new standard for the beam intensity measurements at the ring accelerators at Fermilab.

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Operation of the DC Current Transformer intensity monitors at FNAL during Run II

Cited by 4 publications

References 5 publications

Slip-stacking Dynamics for High-Power Proton Beams at Fermilab

Slip-stacking Dynamics for High-Power Proton Beams at Fermilab

A cryogenic sensing element for measurement current transformers

Digital Signal Processing and Generation for a DC Current Transformer for Particle Accelerators

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