Related Experiment Video
Updated: Aug 27, 2025
09:23
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
14.6K
A haloscope amplification chain based on a traveling wave parametric amplifier.
Caterina Braggio1, Giulio Cappelli2, Giovanni Carugno3
1Dip. di Fisica e Astronomia, Università di Padova, 35100 Padova, Italy.
The Review of Scientific Instruments
|October 1, 2022
Summary
We characterized a radio frequency (RF) amplification chain for dark matter axion searches. The system achieved a low system noise temperature of 3.3 K, crucial for sensitive detection experiments.
Area of Science:
- * Experimental physics
- * Astrophysics
- * Particle physics
Background:
- * Dark matter axion searches require highly sensitive detection systems.
- * Traveling wave parametric amplifiers offer potential for low-noise radio frequency (RF) amplification.
- * High Q microwave resonant cavities are essential for detecting axions.
Purpose of the Study:
- * To characterize an RF amplification chain for dark matter axion detection.
- * To evaluate the performance of a traveling wave parametric amplifier in this context.
- * To measure the system noise temperature at the cavity output port.
Main Methods:
- * Development and characterization of an RF amplification chain.
- * Coupling the amplification chain to a high Q microwave resonant cavity.
- * Implementation of a novel calibration scheme for system noise temperature measurement.
Main Results:
- * Successful characterization of the RF amplification chain.
- * Measurement of a system noise temperature (Tsys) of (3.3 ± 0.1) K at 10.77 GHz.
- * Validation of a novel calibration scheme enabling precise Tsys measurement at the cavity output.
Conclusions:
- * The developed RF amplification chain is suitable for dark matter axion searches.
- * The low system noise temperature achieved is a significant advancement for sensitive experiments.
- * The novel calibration technique enhances the reliability of noise temperature measurements.
Related Concept Videos
01:16Cascaded Op Amps
703
Operational amplifiers (op-amps) are versatile electronic components that can be interconnected in a cascade - one after another in a linear sequence. This cascading is possible due to their infinite input resistance and zero output resistance, allowing them to maintain their input-output relationships even when connected in series.
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
703
01:22Amplifying Signals via Enzymatic Cascade
8.7K
When a ligand binds to a cell-surface receptor, the receptor's intracellular domain changes shape, which may either activate its enzyme function or allow its binding to other molecules. The initial signal is amplified by most signal transduction pathways. This means that a single ligand molecule can activate multiple molecules of a downstream target. Proteins that relay a signal are most commonly phosphorylated at one or more sites, activating or inactivating the protein. Kinases catalyze...
8.7K
01:17Design Example: Vintage Mixing Console
280
A sound engineer at a music company recently encountered a problem. The output from their newly acquired studio's vintage mixing console was too low for the requirements of modern recording equipment. To rectify this situation, the engineer decided to design an audio pre-amplifier using an operational amplifier (op-amp) to boost the signal level.
The specifications for the pre-amplifier were clear. It needed to amplify the audio signal by a factor of 10, have an input impedance above 10...
The specifications for the pre-amplifier were clear. It needed to amplify the audio signal by a factor of 10, have an input impedance above 10...
280
01:25Instrumentation Amplifier
676
An electrocardiography (ECG) machine is an essential piece of medical equipment used to monitor the electrical activity of the heart. It operates by detecting small electrical changes on the skin that result from the depolarization of the heart muscle during each heartbeat. However, these signals are in the microvolt range and can be easily overwhelmed by noise or interference.
To overcome this challenge, an ECG machine utilizes an instrumentation amplifier. This specialized amplifier is...
To overcome this challenge, an ECG machine utilizes an instrumentation amplifier. This specialized amplifier is...
676
01:17MOSFET Amplifiers
215
The MOSFET, when operating in its active region, functions as a voltage-controlled current source. In this region, the gate-to-source voltage controls the drain current. This principle underlies the operation of the transconductance MOSFET amplifier. The output current is directed through a load resistor to convert this amplifier into a voltage amplifier. The output voltage is then obtained by subtracting the voltage drop across the load resistance from the supply voltage. This process results...
215
01:20Design Example: Capacitance Multiplier Circuit
918
In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
918