Displacement sensor for a gravitational redshift experiment with 67Zn Mössbauer resonance

Erkki Ikonen; Heikki Seppä; Walter Potzel; Christopher Schäfer

doi:10.1063/1.1142140

Displacement sensor for a gravitational redshift experiment with ⁶⁷Zn Mössbauer resonance

Erkki Ikonen, Heikki Seppä, Walter Potzel, Christopher Schäfer

Research output: Contribution to journal › Article › Scientific › peer-review

6 Citations (Scopus)

Abstract

A displacement sensor was constructed to monitor the motion of a piezoelectric Doppler velocity transducer in a gravitational redshift experiment with ⁶⁷Zn Mössbauer resonance. The sensor uses a dc superconducting quantum interference device (SQUID) to detect small displacements of a permanent magnet. To meet the stringent requirements of the redshift experiment, the magnetic flux gradient and the pickup coil of the sensor are designed in such a way that the SQUID flux noise of 7 × 10⁻⁶ Φ₀/√Hz corresponds to a displacement resolution of 6 × 10⁻¹⁴ m/√Hz. However, resolution up to 3 × 10⁻¹⁵ m/√Hz in the frequency band of 20–20 000 Hz is demonstrated. The linearity of the displacement sensor and the piezoelectric transducer are considered in detail and the resulting uncertainties associated with the Doppler modulation in the Mössbauer experiment are evaluated.

Original language	English
Pages (from-to)	441 - 449
Number of pages	9
Journal	Review of Scientific Instruments
Volume	62
Issue number	2
DOIs	https://doi.org/10.1063/1.1142140
Publication status	Published - 1991
MoE publication type	A1 Journal article-refereed

Access to Document

10.1063/1.1142140

Cite this

@article{3c946d5d1ef748aba163b917def2ee74,

title = "Displacement sensor for a gravitational redshift experiment with 67Zn M{\"o}ssbauer resonance",

abstract = "A displacement sensor was constructed to monitor the motion of a piezoelectric Doppler velocity transducer in a gravitational redshift experiment with 67Zn M{\"o}ssbauer resonance. The sensor uses a dc superconducting quantum interference device (SQUID) to detect small displacements of a permanent magnet. To meet the stringent requirements of the redshift experiment, the magnetic flux gradient and the pickup coil of the sensor are designed in such a way that the SQUID flux noise of 7 × 10−6 Φ0/√Hz corresponds to a displacement resolution of 6 × 10−14 m/√Hz. However, resolution up to 3 × 10−15 m/√Hz in the frequency band of 20–20 000 Hz is demonstrated. The linearity of the displacement sensor and the piezoelectric transducer are considered in detail and the resulting uncertainties associated with the Doppler modulation in the M{\"o}ssbauer experiment are evaluated.",

author = "Erkki Ikonen and Heikki Sepp{\"a} and Walter Potzel and Christopher Sch{\"a}fer",

note = "Project code: S{\"A}H1201",

year = "1991",

doi = "10.1063/1.1142140",

language = "English",

volume = "62",

pages = "441 -- 449",

journal = "Review of Scientific Instruments",

issn = "0034-6748",

publisher = "American Institute of Physics (AIP)",

number = "2",

}

TY - JOUR

T1 - Displacement sensor for a gravitational redshift experiment with 67Zn Mössbauer resonance

AU - Ikonen, Erkki

AU - Seppä, Heikki

AU - Potzel, Walter

AU - Schäfer, Christopher

N1 - Project code: SÄH1201

PY - 1991

Y1 - 1991

N2 - A displacement sensor was constructed to monitor the motion of a piezoelectric Doppler velocity transducer in a gravitational redshift experiment with 67Zn Mössbauer resonance. The sensor uses a dc superconducting quantum interference device (SQUID) to detect small displacements of a permanent magnet. To meet the stringent requirements of the redshift experiment, the magnetic flux gradient and the pickup coil of the sensor are designed in such a way that the SQUID flux noise of 7 × 10−6 Φ0/√Hz corresponds to a displacement resolution of 6 × 10−14 m/√Hz. However, resolution up to 3 × 10−15 m/√Hz in the frequency band of 20–20 000 Hz is demonstrated. The linearity of the displacement sensor and the piezoelectric transducer are considered in detail and the resulting uncertainties associated with the Doppler modulation in the Mössbauer experiment are evaluated.

AB - A displacement sensor was constructed to monitor the motion of a piezoelectric Doppler velocity transducer in a gravitational redshift experiment with 67Zn Mössbauer resonance. The sensor uses a dc superconducting quantum interference device (SQUID) to detect small displacements of a permanent magnet. To meet the stringent requirements of the redshift experiment, the magnetic flux gradient and the pickup coil of the sensor are designed in such a way that the SQUID flux noise of 7 × 10−6 Φ0/√Hz corresponds to a displacement resolution of 6 × 10−14 m/√Hz. However, resolution up to 3 × 10−15 m/√Hz in the frequency band of 20–20 000 Hz is demonstrated. The linearity of the displacement sensor and the piezoelectric transducer are considered in detail and the resulting uncertainties associated with the Doppler modulation in the Mössbauer experiment are evaluated.

U2 - 10.1063/1.1142140

DO - 10.1063/1.1142140

M3 - Article

SN - 0034-6748

VL - 62

SP - 441

EP - 449

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 2

ER -

Displacement sensor for a gravitational redshift experiment with 67Zn Mössbauer resonance

Abstract

Access to Document

Fingerprint

Cite this

Displacement sensor for a gravitational redshift experiment with ⁶⁷Zn Mössbauer resonance