These pages are here to provide engineering information about current status of calibration lamps that are used in the ING. Configuration on the WHT A&G lamps and the Nasmyth calibration box can be found here.
Calibration lamps - general information
On the WHT telescope there are two places for calibration (comparison) lamps.
1) inside the A&G box for calibrating instruments on at the Cass focus
2) in the (WEAVE) Cal Unit mounted on the outside of the Telescope centre section (broken cass) for calibrating
instruments mounted on the top end.
The broken-Cass CAL Unit has 4 slide positions for calibration sources.For WEAVE these are currently occupied by Tungsten(Quartz Tungsten Halogen or QTH lamp), 2 wavelength standards (Thorium Argon and Cerium Argon) and one Neon arc lamp (1 Amp) used for guide fibre calibration. Light from these sources is directed to the Nasmyth flat and reflected upwards to the top end where the instrument is mounted.
Other power supplies can be found in the WYFFOS Long Camera cabinet underneath the observing floor and in the INT Coude lab in the first grey cabinet on the right.
The types of spectral calibration lamps available are:
For details on the lamps or to order them have a look at the following websites:
The emitting area in a Hollow cathode lamp is typically < 5 mm diameter and contained within a hollow tube.
The tubular glass envelope is much larger than the emitting area and the front window is typically 100 mm distant.
All of the above makes for very inefficient optical coupling but is the only commercial design available for solid elements.
Light is produced by excitation of the solid element through bombardment by accelerated gas species.
The chief elements in HC lamps used at ING are
Thorium (Th), Copper (Cu) and Iron (Fe), with low pressure fill gases Argon and Neon also producing analytical lines.
Most of the Hollow Cathode lamps are quite old and even spares may fail.
The most recently procured HC lamps are are Thorium-Argon and Cerium-Argon from Photron and Heraeus in 2016 and 2022.
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Figure1 |
Figure2 |
Calibration lamps - current status
The main storage space for Calibration lamps is the Wyffos Lamps cabinet in the mezzanine floor but some regularly swapped lamps are left in Observing floor cabinet. Current location given in table entries below. The installation of lamps in the AF2/WEAVE Cal Unit has to be done by an engineer on a support astronomer. Lamps currently in use should be identified with a green background here and broken ones with a red background (from 2016)
| Number | Type | Filler gas | Element | Brand | Location | Information | Date | Username |
| 17 | penray | "A" (Argon) | Oriel | Wyffos L.C. Cabinet | 06/10/04, 10:38:49 | mfb | ||
|
"24" 66056303 |
penray | Kr | Oriel | Wyffos L.C. Cabinet | 12/11/04, 5/2016 | NOM | ||
| blank | penray | Kr | Oriel | Wyffos L.C. Cabinet | 5/2016 identified | NOM | ||
| 25 | penray | Ar | Oriel | Wyffos L.C. Cabinet | 12/11/04, 5/2016 | mfb | ||
| 27 | penray | Hg (A) | Oriel | Observing Floor Cabinet | labelled "in use" - last used in AF2 Cal Unit, but substituted by ThAr | 12/11/04, 09:17:42 | mfb | |
| 28 | penray | Hg (A) | Oriel | Wyffos L.C. Cabinet | 12/11/04, 09:18:19 | mfb | ||
| penray | Hg (A) | Oriel | Wyffos L.C. Cabinet | first entry 5/2016 | NOM | |||
| Ne2016-1 | penray | Ne | UVP | Wyffos L.C. Cabinet | Bought 7/2016 to resolve failing lamps. Spare for WEAVE | 8/2016 | NOM | |
| Ne2016-2 | penray | Ne | UVP | Wyffos L.C. Cabinet | Bought 7/2016 to resolve failing lamps. Spare for WEAVE | 8/2016 | NOM | |
| Ne2016-3 | penray | Ne | UVP | Wyffos L.C. Cabinet | Bought 7/2016 to resolve failing lamps. Spare for WEAVE | 8/2016 | NOM | |
| B-173001 | penray | Ne | ? | Not located 2016 | 10/03/06, 6/6/16 | NOM | ||
| B-173189 | penray | Ne | Oriel | Test Focal Station | Failed to strike in AF2 Cal Unit 2016/6/9. Works in Lab with short delay. | 27/01/10 | NOM | |
| B-172999 | penray | Ne | Oriel | TFS Waste bulbs | Tested on 09/02/2010 by Tibor Agocs - NOT WORKING | 09/02/10 | Tibor | |
| missing (29?) | penray | Ne | Oriel | Test Focal Stn waste | Requested to change it after fault #16517 Flickering, very weak. | 12/11/04, 6/6/2016 | NOM | |
| B-173281 | penray | Ne | ? | Not located 2016 | Received 10/03/2005 | 10/03/05, 6/6/2016 | NOM | |
| B-173282 | penray | Ne | ? | Not located 2016 | Received 10/03/2005 | 10/03/05, 6/6/2016 | NOM | |
| B-173280 | penray | Ne | Oriel | Test focal station waste lamps | Received 10/03/2005. Removed from service 2014/1. Dead. | 10/03/05, 15:46:45 | NOM | |
| B-173284 | penray | Ne | Oriel | Removed from AF2 Cal Unit 9/6/16 to Test Focal Station. | Received 10/03/2005 9/6/16 Intermittent fault, long delays in striking when cold | 10/03/05, 15:49:00 | NOM | |
| B-173286 | penray | Ne | Oriel | AF2 Cal Unit (in service) |
Received 10/03/2005, Working in AF2 Cal Unit 2016/6/9 |
10/03/05, 9/6/16 27/01/10 | NOM | |
| B-173287 | penray | Ne | Oriel | TFS waste bulbs |
Received 10/03/2005,
Tested on 27/01/2010 by Tibor Agocs - NOT WORKING |
10/03/05, 27/01/10 | Tibor | |
| B173007 | penray | Ar | UVP | working 2/14. Spare. | 10/03/06, 14:38:13 | NOM | ||
| B-173564 | penray | Ar | UVP | located 5/2016. Spare | 10/03/06, 14:38:44 | NOM | ||
| B-173192 | penray | Ar | UVP | entered 5/2016. Has been used. | original date 30-8-04 | MFB | ||
| B-173191 | penray | Ar | UVP | entered 5/2016. Spare | original date 30/8/2004 | MFB | ||
| B-173172 | penray | Ar | UVP | entered 5/2016. Used? | original date 16-07-04 | MFB | ||
| penray (large size) | unknown | Cd (Cadmium) | Oriel | TFS Optics Cabinet #3 | Tested in Wyffos for far blue lines | April 2012 | NOM | |
| penray (large size) | unknown | Zn (Zinc) | Oriel | TFS Optics Cabinet #3 | Tested in Wyffos for far blue lines | April 2012 | NOM | |
| B-173192 | penray | Ar | UVP | Wyffos L.C. Cabinet | entered 5/2016. Has been used. | original date 30-8-04 | NOM | |
| Xe2016-1 | penray | Xe | UVP | Wyffos L.C. Cabinet | entered 5/2016 | NOM | ||
| (box 28) | penray | Xe | Oriel | Observing Floor Cabinet | old spare | entered 5/2016 | NOM | |
| 66083195 | penray | Xe | Oriel | Observing Floor Cabinet | in service - LIRIS | entered 5/2016 | NOM | |
| Number | Type | Filler gas | Element | Location | Information | Date | Username | |
| PEG2148 | cathode | Ar | Th | AF2 Calibration Unit | Photron 60mA purchsed for WEAVE |
Jan 2016 ISIS tests May in AF2 Cal Unit |
NOM | |
| HNB0798 | cathode | Ar | Th | TFS Optical Cabinet #3 | Photron 60mA purchsed for WEAVE | received, tested May 2016 | NOM | |
| HNB0799 | cathode | Ar | Th | TFS Optical Cabinet #3 | Photron 60mA purchsed for WEAVE | received, tested May 2016 | NOM | |
| HNC0726 | cathode | Ar | Th | TFS Optical Cabinet #3 | Photron 60mA purchsed for WEAVE | received, tested May 2016 | NOM | |
| 80018123 | cathode | Ar | Th | TFS Optical Cabinet #3 | Heraeus 15mA used for Wyffos 2012-2016 | April 2012 | NOM | |
| 1 | cathode | Ar | Th | Wyffos L.C. Cabinet | 05/10/04, 14:59:17 | mfb | ||
| 2 | cathode | Ar | Fe | Wyffos L.C. Cabinet | 05/10/04, 15:20:36 | mfb | ||
| #003 (Hilger 10033) | cathode | He | Cu | Test Focal Station | Draws No Current - Glow only, 4 bright lines in IDS/1200 | 20/03/12, 11 am | nom | |
| 4 | cathode | Ne | Hg | Wyffos L.C. Cabinet | 05/10/04, 15:22:50 | mfb | ||
| 5 | cathode | Ne | Fe | Wyffos L.C. Cabinet | 05/10/04, 15:23:49 | mfb | ||
| #006 (10816) | cathode | Ar | Cu | Test Focal Station | Hilger (v.old) Weaker lines disappearing, stronger lines increasing. OK for low-res work? | 20/03/12, 11 a.m. | nom | |
| 7 | cathode | Ar | Fe | Wyffos L.C. Cabinet | 05/10/04, 15:30:54 | mfb | ||
| #008 (10815) | cathode | Ar | Cu | Test Focal Station | Weaker lines disappearing, stronger lines increasing. Hilger (v.old) | 20/03/12 11 a.m. | nom | |
| 9 | cathode | Ne | Ni | Wyffos L.C. Cabinet | Looks bad | 05/10/04, 15:46:13 | mfb | |
| 10 | cathode | A | Cu | Wyffos L.C. Cabinet | 05/10/04, 15:48:57 | mfb | ||
| 11 | cathode | Ne | Fe | Wyffos L.C. Cabinet | 05/10/04, 15:49:33 | mfb | ||
| 12 | cathode | Ar | Cu | Wyffos L.C. Cabinet | 06/10/04, 09:07:32 | mfb | ||
| #013 | cathode | A | Cu | Wyffos L.C. Cabinet | Westinghouse, weaker lines are reasonable at higher than usual current (20mA max) | 20/03/12 11 a.m. | nom | |
| 14 | cathode | Ar | Cu | Wyffos L.C. Cabinet | 06/10/04, 09:09:37 | mfb | ||
| 18 | cathode | Ar | Th | Wyffos L.C. Cabinet | 06/10/04, 10:55:14 | mfb | ||
| 19 | cathode | Ar | Cu | Wyffos L.C. Cabinet | 06/10/04, 10:55:36 | mfb | ||
| #020 (Juniper 904165) | cathode | Ar | Cu | IDS CuAr position (Lamp 1) | Weaker lines giving good counts in 180s for 1200 grating. Startup problem (1997) not observed. | 20/03/12 12 a.m. | nom | |
| 21 | cathode | Ar | Cu | Filter Cabinet | 06/10/04, 11:24:22 | mfb | ||
| 22 | cathode | A | Cu | Filter Cabinet | 06/10/04, 11:26:06 | mfb | ||
| 23 | cathode | Ar | Th | Filter Cabinet | 06/10/04, 11:26:45 | mfb | ||
| cathode | Ar | Th | Filter Cabinet | This lamp is on loan from ESO (contact Max Pettini) | 06/10/04, 11:28:10 | mfb | ||
| 15 | other | Hg | Wyffos L.C. Cabinet | Type: Super Pressure mercury Lamp Manufacturer: Wotan, Germany | 06/10/04, 09:54:35 | mfb | ||
| 16 | other | Hg | Wyffos L.C. Cabinet | Type: Super Pressure mercury Lamp Manufacturer: Wotan, Germany | 06/10/04, 09:55:43 | mfb | ||