Survey on the use of THz radiation Introduction
There is an increased interest in the use of THz radiation in a variety of applications, from biomedical imaging to material science and security. As part of the European Coordination Action EMF-NET funded in the 6th Framework Programme of the EU, a working group is monitoring the potential effects of this type of radiation with biological systems and is compiling information with respect to the characteristics and the use of currently available THz radiation sources. We are interested in wavelengths from 3 mm (400 µeV, 100 GHz) to 30 µm (40 meV, 10 THz). Would you be prepared to answer a few questions about the THz radiation you employ? Preliminary data collected within the European project THz-BRIDGE are available on the web-site www.frascati.enea.it/THz-BRIDGE/ Information about the EMF-NET consortium can be found on the web-site: www.jrc.cec.eu.int/emf-net Thank you for your time.

1) The THz radiation we use is generated from (please tick all that are applicable)

a Solid State Laser system	a gas laser
an oscillator (GUNN, IMPATT, etc.)	a Quantum Cascade Laser
a Free Electron Laser	an OPA system
a Synchrotron Radiation Source	other:

2) The main characteristics of our source are (please complete this section for each source in your laboratory, thank-you)

	Source 1	Source 2	Source 3	Source 4
Central wavelength/frq.
Bandwidth
Tuning range
Average power
for pulsed systems:
Peak power
Pulse duration
Repetition rate

Is your laser amplitude modulated?

Yes	No, please go to question 3
If, yes, please specify, frequency and other details, (for example the macropulse structure and any low-frequency modulations):

3) We comply with the following regulations for the use of lasers and microwave sources.

	EN 60825-1 (Europe) “Safety of laser products”		ANSI Z-136.1(2000) (America)“ American national standard for the safe use of lasers”
	ENV 50166-2 “Human exposure to electromagnetic fields: High Frequency. (10 kHz to 300 GHz)”		other (please describe)

If, you have completed maximum permissive exposure (MPE) calculations, please state the MPE for each of your sources;

	MPE
Source 1 :
Source 2 :
Source 3 :
Source 4 :

4) We also take the following shielding precautions on the THz beam-line (max. 250 words).

Do you have concerns over the potential biological effects of THz radiation?

Yes	No, please go to question 5
If, yes, in which areas
Direct acute effects on cells
Direct chronic effects on cells
Indirect effects via interaction with endogenous chemicals
Indirect effects via interaction with exogenous chemicals        (e.g. topically applied chemicals or systemically taken drugs)

5) Are your occupational workers exposed to THz radiation?

Yes	No, please go to question 6

Number of personnel subject to exposure to THz radiation

between 1 and 3

between 4 and 7

greater than 7:     please state

Please estimate the typical duration and frequency of exposure for personnel

Duration
less than 6 minutes	between 6 and 20 minutes	greater than 20 minutes

Frequency
once a month	once a week	once a day	several times a day

Please estimate the maximum peak and average power of exposure on your occupational worker/s to THz radiation.

The estimated peak power is W/cm²
The estimated average power is W/cm²

Do you have any concerns regarding exposure of occupational workers to THz radiation?

Yes	No, please go to question 6

If, yes, please state.

6) We employ the source(s) in the following applications: (tick all that are applicable)

source development	spectroscopy
biology	material science
biomedical studies	imaging
security	other (please specify):

Thank you for your assistance

Name:
Position:
Institution: University/Company
Department
Address
Town
Country
Zip or post code

PRIVACY STATEMENT
By sending this form you agree that the data collected from this survey can be stored on a database held by the THz-BRIDGE consortium. The data collected will be analysed and aggregated eliminating any personally identifiable information in the process. The aggregate information will be disseminated to the scientific community by the THz-BRIDGE consortium and will not be used for any commercial purpose. No personally identifiable information will be shared with any third party.

I would like a copy of the final report on this survey.
You may NOT contact me for additional information