IBIC2021 - List of Authors (Michnoff, R.J.)

Paper	Title	Page
MOPP04	Conceptual Design Overview of the Electron Ion Collider Instrumentation	30
	D.M. Gassner, M. Blaskiewicz, K.A. Drees, T. Hayes, C. Hetzel, D. Holmes, R.L. Hulsart, P. Inacker, C. Liu, R.J. Michnoff, M.G. Minty, C. Montag, D. Padrazo Jr, M.C. Paniccia, V. Ptitsyn, V.H. Ranjbar, M.P. Sangroula, T.V. Shaftan, P. Thieberger, E. Wang, F.J. Willeke BNL, Upton, New York, USA J.R. Bellon, A. Blednykh Brookhaven National Laboratory (BNL), Electron-Ion Collider, Upton, New York, USA L.R. Dalesio Osprey DCS LLC, Ocean City, USA
	Funding: Work supported by Brookhaven Science Associates, LLC under Con-tract No. DE-SC0012704 with the U.S. Department of Energy. A new high-luminosity Electron Ion Collider (EIC) is being developed at Brookhaven National Laboratory (BNL). The conceptual design [1] has recently been completed. The EIC will be realized in the existing RHIC facility. In addition to improving the existing hadron storage ring instrumentation, new electron accelerators that include a 350 keV gun, 400 MeV Linac, a rapid-cycling synchrotron, an electron storage ring, and a strong hadron cooling facility will all have new instrumentation systems. An overview of the conceptual design of the beam instrumentation will be presented.
	Poster MOPP04 [4.645 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-MOPP04
About •	paper received ※ 08 September 2021 paper accepted ※ 17 September 2021 issue date ※ 15 October 2021
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MOPP20	Beam Position Monitor Calibration by Rapid Channel Switching	84
	R.L. Hulsart, R.J. Michnoff, S. Seletskiy, P. Thieberger BNL, Upton, New York, USA
	One of the requirements for low-energy RHIC electron cooling (LEReC) is a small relative angle between the ion and electron beams as they co-propagate. In order to minimize relative electron-ion trajectories angle, BPM measurements of both beams must be very accurate. Achieving this requires good electronic calibration of the associated cables and RF components, due to their inherent imperfections. Unfortunately, these are typically frequency dependent, especially in the RF filter and amplifier stages. The spectral content of the ion vs. electron bunch signals varies significantly, presenting a calibration challenge, even when using the same sampling channels and electronics to measure both beams. A scheme of rapidly swapping the BPM signals from the pickup electrodes between the two signal cables (and sampling channels), using switches installed near the BPM was implemented to combat these calibration is-sues. Bias in each signal path appears as an offset which has an equal and opposite component when the cables are reversed. Taking the average of the two measurements with the channels in normal and reverse positions reduces this offset error. Successful transverse cooling of the RHIC ion beam has been verified after using this switching technique to provide continuous calibration of the BPM electronics [1]. Details of the processing hard-ware and switch control methodology to achieve this result will be discussed.
	Poster MOPP20 [0.491 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-MOPP20
About •	paper received ※ 07 September 2021 paper accepted ※ 17 September 2021 issue date ※ 08 October 2021
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TUPP30	Fast Scanning Diamond Detector for Electron Beam Profile Monitoring	276
	V.V. Konovalov Applied Diamond, Inc., Wilmington, Delaware, USA S. Bellavia, J.C. Brutus, R.J. Michnoff, T.A. Miller, P. Thieberger BNL, Upton, New York, USA
	Funding: US DOE, SBIR DE-SC0020498 Recently new high energy electron cooling beam projects, CeC and LEReC, were proposed at Brookhaven National Laboratory as part of a future electron-ion collider. Efficient electron cooling requires a high quality, high power electron beam with tight parameters (energy and space trajectory). In order to achieve and maintain the required parameters and stability of the electron beam, its parameters have to be continuously monitored and feedback control has to be developed. However, existing detectors are not suitable for invasive profile measurements of powerful continuous wave (CW) electron beams. As a result, the beam profile of powerful CW electron beams is currently monitored in low repetition pulsed mode and assumed to remain the same in CW mode. The first prototype of a fast scanning diamond beam profile detector (DBPD) suitable for invasive high power CW electron beam core profile measurements in transmittance mode was developed. It consists of a multi-strip solid state diamond detector to scan with high speed (up to 1 m/s) and precision (about 5 um) through the core of an electron beam. The diamond sensor was made from a thin pc-CVD diamond plate with highly B-doped CVD diamond conductive strips. Transient currents from the multi-strip detector were measured with fast digitizing electrometers. Successful operation of the DBPD was demonstrated for pulsed (5 Hz) and CW (78 kHz) CeC beams, including the detector’s ability to withstand a 20 sec insertion into the CW CeC beam core. The X-Y beam spatial profile was measured in one scan. Thermal modeling demonstrated a manageable thermal impact even from a relatively long (up to 2 min) insertion of the diamond sensor into the CW CeC core. Electrical impedance modeling of the detector and vacuum chamber assembly demonstrated minimal impact on beam line impedance with diamond sensor insertion.
	Poster TUPP30 [0.674 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-TUPP30
About •	paper received ※ 03 September 2021 paper accepted ※ 28 September 2021 issue date ※ 16 October 2021
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Conceptual Design Overview of the Electron Ion Collider Instrumentation

30

D.M. Gassner, M. Blaskiewicz, K.A. Drees, T. Hayes, C. Hetzel, D. Holmes, R.L. Hulsart, P. Inacker, C. Liu, R.J. Michnoff, M.G. Minty, C. Montag, D. Padrazo Jr, M.C. Paniccia, V. Ptitsyn, V.H. Ranjbar, M.P. Sangroula, T.V. Shaftan, P. Thieberger, E. Wang, F.J. Willeke
BNL, Upton, New York, USA
J.R. Bellon, A. Blednykh
Brookhaven National Laboratory (BNL), Electron-Ion Collider, Upton, New York, USA
L.R. Dalesio
Osprey DCS LLC, Ocean City, USA

Funding: Work supported by Brookhaven Science Associates, LLC under Con-tract No. DE-SC0012704 with the U.S. Department of Energy.
A new high-luminosity Electron Ion Collider (EIC) is being developed at Brookhaven National Laboratory (BNL). The conceptual design [1] has recently been completed. The EIC will be realized in the existing RHIC facility. In addition to improving the existing hadron storage ring instrumentation, new electron accelerators that include a 350 keV gun, 400 MeV Linac, a rapid-cycling synchrotron, an electron storage ring, and a strong hadron cooling facility will all have new instrumentation systems. An overview of the conceptual design of the beam instrumentation will be presented.

Poster MOPP04 [4.645 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-MOPP04

About •

paper received ※ 08 September 2021 paper accepted ※ 17 September 2021 issue date ※ 15 October 2021

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPP20

Beam Position Monitor Calibration by Rapid Channel Switching

84

R.L. Hulsart, R.J. Michnoff, S. Seletskiy, P. Thieberger
BNL, Upton, New York, USA

One of the requirements for low-energy RHIC electron cooling (LEReC) is a small relative angle between the ion and electron beams as they co-propagate. In order to minimize relative electron-ion trajectories angle, BPM measurements of both beams must be very accurate. Achieving this requires good electronic calibration of the associated cables and RF components, due to their inherent imperfections. Unfortunately, these are typically frequency dependent, especially in the RF filter and amplifier stages. The spectral content of the ion vs. electron bunch signals varies significantly, presenting a calibration challenge, even when using the same sampling channels and electronics to measure both beams. A scheme of rapidly swapping the BPM signals from the pickup electrodes between the two signal cables (and sampling channels), using switches installed near the BPM was implemented to combat these calibration is-sues. Bias in each signal path appears as an offset which has an equal and opposite component when the cables are reversed. Taking the average of the two measurements with the channels in normal and reverse positions reduces this offset error. Successful transverse cooling of the RHIC ion beam has been verified after using this switching technique to provide continuous calibration of the BPM electronics [1]. Details of the processing hard-ware and switch control methodology to achieve this result will be discussed.

Poster MOPP20 [0.491 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-MOPP20

About •

paper received ※ 07 September 2021 paper accepted ※ 17 September 2021 issue date ※ 08 October 2021

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPP30

Fast Scanning Diamond Detector for Electron Beam Profile Monitoring

276

V.V. Konovalov
Applied Diamond, Inc., Wilmington, Delaware, USA
S. Bellavia, J.C. Brutus, R.J. Michnoff, T.A. Miller, P. Thieberger
BNL, Upton, New York, USA

Funding: US DOE, SBIR DE-SC0020498
Recently new high energy electron cooling beam projects, CeC and LEReC, were proposed at Brookhaven National Laboratory as part of a future electron-ion collider. Efficient electron cooling requires a high quality, high power electron beam with tight parameters (energy and space trajectory). In order to achieve and maintain the required parameters and stability of the electron beam, its parameters have to be continuously monitored and feedback control has to be developed. However, existing detectors are not suitable for invasive profile measurements of powerful continuous wave (CW) electron beams. As a result, the beam profile of powerful CW electron beams is currently monitored in low repetition pulsed mode and assumed to remain the same in CW mode. The first prototype of a fast scanning diamond beam profile detector (DBPD) suitable for invasive high power CW electron beam core profile measurements in transmittance mode was developed. It consists of a multi-strip solid state diamond detector to scan with high speed (up to 1 m/s) and precision (about 5 um) through the core of an electron beam. The diamond sensor was made from a thin pc-CVD diamond plate with highly B-doped CVD diamond conductive strips. Transient currents from the multi-strip detector were measured with fast digitizing electrometers. Successful operation of the DBPD was demonstrated for pulsed (5 Hz) and CW (78 kHz) CeC beams, including the detector’s ability to withstand a 20 sec insertion into the CW CeC beam core. The X-Y beam spatial profile was measured in one scan. Thermal modeling demonstrated a manageable thermal impact even from a relatively long (up to 2 min) insertion of the diamond sensor into the CW CeC core. Electrical impedance modeling of the detector and vacuum chamber assembly demonstrated minimal impact on beam line impedance with diamond sensor insertion.

Poster TUPP30 [0.674 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-TUPP30

About •

paper received ※ 03 September 2021 paper accepted ※ 28 September 2021 issue date ※ 16 October 2021

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)