CERN telecom sources CERN seminar on NonIonizing Radiation

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CERN telecom sources CERN seminar on Non-Ionizing Radiation Stefano Agosta IT-CS CERN telecom sources

CERN telecom sources CERN seminar on Non-Ionizing Radiation Stefano Agosta IT-CS CERN telecom sources 2

Agenda • Telecom services • Emissions characteristics • Protective measures CERN telecom sources 3

Agenda • Telecom services • Emissions characteristics • Protective measures CERN telecom sources 3

Services mobile TETRA Io. T Wi-Fi CERN telecom sources 4

Services mobile TETRA Io. T Wi-Fi CERN telecom sources 4

Outdoor network • • 15 mobile sites: 40 W radiated power 6 TETRA sites:

Outdoor network • • 15 mobile sites: 40 W radiated power 6 TETRA sites: 4 W radiated power CERN telecom sources 5

Io. T 10 sites 0. 1 W radiated power CERN telecom sources 6

Io. T 10 sites 0. 1 W radiated power CERN telecom sources 6

Wi-Fi 4000+ access points, everywhere 0. 1 W radiated power CERN telecom sources 7

Wi-Fi 4000+ access points, everywhere 0. 1 W radiated power CERN telecom sources 7

Regulations Outdoor networks International Commission on Non-Ionizing Radiation Protection (ICNRP) guidelines: • Limits defined

Regulations Outdoor networks International Commission on Non-Ionizing Radiation Protection (ICNRP) guidelines: • Limits defined in terms of Specific Absorption Rate (SAR), leading to limits on electrical field strength E • Each country adopts own limits (CH 10 x stricter than FR) • Frequency dependent • Length of stay dependent o 800+ hours/year: Lieu à Utilization Sensible (LUS) o Otherwise: Lieu de Séjour Momentané (LSM) e. g. GSM @1800 MHz Emax = 6 V/m in LUS and 60 in LSM. CERN telecom sources 8

Protective measures outdoor networks Theoretical calculation during design Safety fencing CERN telecom sources 9

Protective measures outdoor networks Theoretical calculation during design Safety fencing CERN telecom sources 9

Protective measures outdoor networks In-house measurements CERN telecom sources 10

Protective measures outdoor networks In-house measurements CERN telecom sources 10

Protective measures outdoor networks 3 rd party measurements CERN telecom sources 11

Protective measures outdoor networks 3 rd party measurements CERN telecom sources 11

Protective measures outdoor networks CERN telecom sources 12

Protective measures outdoor networks CERN telecom sources 12

Protective measures Duty cycle CERN telecom sources 13

Protective measures Duty cycle CERN telecom sources 13

Protective measures More reading CERN telecom sources 14

Protective measures More reading CERN telecom sources 14

Protective measures Wi-Fi and Io. T emitters comply with manufacturing standards on max emissions

Protective measures Wi-Fi and Io. T emitters comply with manufacturing standards on max emissions CERN telecom sources 15