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Laser Room Hazards: Installed and operational now: IV Nd:YVO 4 , CW, 532 nm, 5 Watt

Motivation. Laser Room Hazards: Installed and operational now: IV Nd:YVO 4 , CW, 532 nm, 5 Watt IV Ti:Sapphire, 79 1/3 MHz, 800 nm, 0.75 Watt IV Nd;YLF, 1 kHz, 527 nm, 22 Watt IV Ti:sapphire, 1 kHz, 800 nm, 2.4 Watt IIIb - 2 w , 1 kHz, 400 nm, 300 mW

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Laser Room Hazards: Installed and operational now: IV Nd:YVO 4 , CW, 532 nm, 5 Watt

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  1. Motivation Laser Room Hazards: Installed and operational now: IV Nd:YVO4, CW, 532 nm, 5 Watt IV Ti:Sapphire, 79 1/3 MHz, 800 nm, 0.75 Watt IV Nd;YLF, 1 kHz, 527 nm, 22 Watt IV Ti:sapphire, 1 kHz, 800 nm, 2.4 Watt IIIb - 2 w, 1 kHz, 400 nm, 300 mW IIIb - 3 w, 1 kHz, 266 nm, 240 mW IIIa Diode Laser, CW, 780 nm, 20 mW IIIa HeNe, CW, 633 nm, 1 mW Coming in mid-2006: IV Nd:YAG, 79 1/3 MHz, 1064 nm, 10 Watt

  2. NLCTA Enclosure Hazards: Ti:Sapphire, 79 1/3 MHz, 800 nm, 0.07 Watt (timing stabilization) Ti:sapphire x 3, 10 Hz, 3 w=266 nm, 12 mW, 120 mJ/pulse (electron production) Diode Laser, CW, 780 nm, 20 mW, (position feedback)

  3. NLCTA Hazard Controls PPS Personnel Protection System Radiation Safety LSS  Laser Safety System There is new hardware to be aware of: • There is a laser transport stopper (in the laser room) that controls laser light entering the NLCTA • PPS logic has been expanded to make E/Os and E/Es work for the LSS as well • NLCTA Control Room PPS panel has a new keyswitch that initiates (and cancels) Laser Test Modein the NLCTA enclosure • Outer doors of NLCTA have a third set of microswitches used by the LSS • There is an LSS sign outside the outer door that indicates one of: • Laser Off– meaning laser transport stopper is closed, door is not magnalocked • Laser Test– meaning LTM is engaged, but laser transport stopper is closed • Laser On – meaning laser transport stopper is OPEN • There is a new LSS stopper control box inside the NLCTA

  4. What Has Changed There is a new access state of the NLCTA called Laser Test Mode • LTM is only active in Permitted Access • LTM locks the outer doors • PPS panels will still display “Hazards Off”, “Permitted Access” • LSS panels will display “Laser Test” or “Laser on” • E/Es and E/Os are active: • E/E allow emergency entry/exit as usual, and will close the laser transport stopper • E/Os close the laser transport stopper (if it is open) • Administrative search: Responsible Qualified Laser Operator will search and secure the NLCTA before opening the laser transport stopper • A 20 second audible and visible alarm sounds prior to the laser transport stopper opening In addition, laser light may be introduced into the NLCTA in C/A and N/A. • PPS has sole control of the magnalock; standard PPS entry procedures apply. However, the laser transport stopper can be opened. NLCTA doors are monitored by the LSS, non-QLO entry will close laser transport stopper. Laser On should always be taken to mean laser is present in the NLCTA

  5. Actions You Must Take • If you are inside the NLCTA enclosure and you hear the audible alarm for the laser, or see that the “Laser On” light is illuminated on the laser control panel (near the gun) • Push the nearest E/O button • Exit the enclosure immediately • Contact the OIC, and note the event in the log • NLCTA door is locked in LTM • No entry is allowed unless you are a QLO (only keyed entry is possible) • Contact QLO for entry at either x.5474 (inside NLCTA) or x.5060 (laser room). • NLCTA is in C/A and LSS sign indicates Laser On • No entry is allowed unless you are a QLO (entry IS possible; stopper closes) • Contact QLO for entry at either x.5474 (inside NLCTA) or x.5060 (laser room). • 4. NLCTA housing has been left in LTM. • For now: page 650-849-9674 (Eric Colby) • Once OICs become QLOs, OICs may cancel LTM.

  6. Becoming aQualified Laser Operator • Take ES&H course 253 (CBT) • Reread the SLAC ES&H Manual Chapter 10, “Laser Safety” • Read the ANSI standard for laser operation: ANSI Z136.1-2000 • Read and sign the “Authorization to Operate the E-163 Laser System and Standard Operating Procedure” • Have an eye exam, with fundus photographs (typically at PAMF), arranged through SLAC Medical. • Interview with Ted Fieguth, SLAC LSO • Contact Eric Colby and complete local laser safety training. • Complete an “Authorization for E-163 Laser System Operator” form • You will be issued a “K1” key allowing access to the laser room. • There is a “K1” key in the NLCTA key safe for emergency use.

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