L1835 high-intensity VUV deuterium lamp. Water-cooled. 115-400 nm.

Overview:

The L1835 provides three to four times higher radiant intensity than a conventional 30 W deuterium lamp. The 150 W lamp is enclosed in a cylindrical metal jacket specially designed for water-cooling. The advantage of water-cooled lamps in comparison to air-cooled types is that the heat loss from the lamp is removed more quickly, ensuring high stability.

Specifications:

• Spectral distribution: 115 to 400 nm
• Window material: MgF2
• Aperture diameter: 2.5 mm
• Cooling method: water-cooling (obligatory)
• Weight: approx. 950 g
• Installation to vacuum port?: yes, flange is needed, for example E3444

Operating parameters and characteristics (at 25 °C):

• Warm-up time: approx. 20 s
• Filament voltage during warm-up (DC, AC): 10 ±1 V
• Filament current during warm-up (DC, AC): typically 1.2 A
• Filament voltage during operation (DC): 5 ±0.5 V
• Filament current during operation (DC): typically 0.8 A
• Discharge starting voltage (DC): minimum 500 V
• Anode current: 1.2 ±0.12 A
• Tube drop voltage (DC): typically 120 V
• Output stability:  fluctuation: 0.05 %p-p (max.), drift: ±1.0 %h (max.)
• Cooling water flow rate: minimum 1.5 l/min 
• Estimated service life: 300 h - not guaranteed

Application examples:

• Spectrophotometry, Fluorescence spectrophotometry
• Static charge removal, for example from wafers or LCD panels
• Photoionisation detector (PID)
• Optical Chemical Vapor Deposition (CVD)
• Photochemical reactions
• Excitation light source